Square bit size chart. Covering a range of bit types - including Phillips, Torx, Square, and Hex - this chart supports eficient tool selection across engineering, carpentry, and construction applications. Supplies and solutions for every industry, plus easy ordering, fast delivery and 24/7 customer support. Content is not reproducable without prior written consent. One advantage over the Phillips drive is that one driver or bit fits all screw sizes. Choose from our selection of square drive bits in a wide range of styles and sizes. , fractional inch and gauge drill bit sizes are in common use. Buy Square Screwdriver Bits at Screwfix. A screwdriver size chart can help you determine the tip width and the length of the blade and overall tool, ensuring that you choose the correct screwdriver size to match your screw. Find Square/Robertson-Head screwdriver bits at Lowe's today. Buy online & collect in hundreds of stores in as little as 1 minute! 60 days free credit available. 7, in addition to the more normal whole number sizes. 133 Min 0. 36"&0. What are these two odd ball sizes associated with, or used for? What are the bit/tip dimensions for them? Added a Wikipedia table for the screw recess dims. It is often found in marine hardware and requires a Frearson screwdriver or bit to work properly. Bit Size #1 #2 #3 Max 0. (For example: "Use a 1. I noticed one set has sizes SQ2. (see Table 1). - Screwdriver Bits Manufacturer, a Taiwan based OEM_ODM manufacturer and supplier of Screwdriver Bits, Ratchet Screwdriver, Drill Bit Manufacturers, Screwdriver Kits, Power Screwdriver Bits, Ratchet Screwdrivers, Accessories for Power Tools & Air Tools, Kits. S. The square drive hex ball detent bits and hex-shank impact duty bits are designed for use with a drill chuck. Whether you’re a seasoned professional or a weekend DIY enthusiast, this guide will equip you with the knowledge you need to choose the right screwdriver bit every time, ensuring successful How to select the correct screwdriver bit for the screw The screwdriver bit you need will depend on the size of screw you want to insert or remove. Nov 20, 2025 · Understanding Square Drive Sizing Standards The square drive system employs a straightforward numbering convention for its bits, standardized into four common sizes: #0, #1, #2, and #3. Comparison Chart The Driver Bit Size Comparison Chart is a practical reference tool designed to help professionals quickly identify and convert common driver bit sizes between imperial and metric measurements. Print this page Square Drive Screw Diameter Drive Size #6 #1 #8 #2 #10 #2 #12 #3 #14 #3 Drill bit size chart guide with fractional, metric, number, and letter sizes. . com. To accommodate different size heads, the square drive is available in 5 different sizes. High Quality 1/4" Hex Shank Sq1 Sq 2 Sq3 Sq4 50mm Square Impact Bit, Find Details and Price about Screwdriver Screwdriver Bit from High Quality 1/4" Hex Shank Sq1 Sq 2 Sq3 Sq4 50mm Square Impact Bit - Anhui Shengshi Hardware Tool Manufacturing Co. A comprehensive guide to bit screw sizes, covering all the standard sizes, their applications, and a detailed explanation of how to identify and use them. Understanding Square Drive Sizing Standards The square drive system employs a straightforward numbering convention for its bits, standardized into four common sizes: #0, #1, #2, and #3. Utilizing a bit size chart effectively can simplify the process, but it’s important to cross-reference and verify for the best fit. I cannot find anywhere on the net what do these R0, R1, markings mean, sometimes they're referred as sizes, but then the detailed dimensions of an R1 and R2 screwdriver are listed as exactly th Thank You! You have successfully downloaded your FREE BIT/SCREW CHART from EZwoodshop. Bit size. 98"Long Magnetic Square Head Screwdriver, Robertson Driver Bits Sizes #0, 1, 2, 3, and #4 Visit the SHAOHUA Store Square Driver Bits SQ1, SQ2, SQ3 Range of sizes abvailable to suit most common screws requiring a square recess bit. Below is the conversion chart for square drive bits. Shop screwdriver bits and a variety of tools products online at Lowes. All product names, logos, and brands are property of their respective owners. Square Drive Bit Sizes Information on TannerBolt. com is property of Tanner unless otherwise noted. 10PCS Square Drive Bits, S2 Alloy Steel Screwdriver Set,2. Delivery 7 days a week Does anyone have a size chart (metric) for Robertson square bits? I'm looking for a 6mm square bit, and don't know if that means SQ5 or SQ4 or if I need something completely different. Here's we've put together screwdriver sizes charts for the 6 most common screw head shapes. 55"& Hex Shank) Square Head Screwdriver Sizes #0, 1, 2, 3, and #4 800+ bought in past month Add to cart Overall Pick When it comes to Square Screwdriver Bits, you can count on Grainger. Square drive screwdrivers and bits come colour coded reflecting the particular size of screw and recess size (see Fig 1). Learn how to choose the right drill bit for wood, metal, and masonry. Learn about how to use Phillips head screwdrivers for all your DIY needs. Square Driver Bits SQ1, SQ2, SQ3 Range of sizes abvailable to suit most common screws requiring a square recess bit. Stop stripping screws. A full screwdriver set might seem like it has far more sizes than you will ever need, but then there comes a day where you realize that your screwdriver set is missing a size that you desperately need. This numbering system is the definitive identifier for bit selection, as it corresponds directly to the size of the square recess in the screw head. Home | Product catalog | Customer service | About Us | Fastener information Accessibility statement | Terms and Does anyone have a size chart (metric) for Robertson square bits? I'm looking for a 6mm square bit, and don't know if that means SQ5 or SQ4 or if I need something completely different. Physical bit shape followed by proper name. The UK’s leading retailer of trade tools and hardware. I cannot find anywhere on the net what do these R0, R1, markings mean, sometimes they're referred as sizes, but then the detailed dimensions of an R1 and R2 screwdriver are listed as exactly th Print this page Square Drive Screw Diameter Drive Size #6 #1 #8 #2 #10 #2 #12 #3 #14 #3 Magnetic Spanner Bit Set, 1" 6-Piece Security Bits SP4 SP6 SP8 SP10 SP12 SP14,S2 Steel Security Bit Set,Magnetic Spanner Screwdriver Bits for Impact Drivers,Electronics & Maintenance Add to cart Overall Pick Spanner Bit Set (10 Pack - 2. They are available in at least 4 sizes (TA18, 0. Choosing the wrong screwdriver bit can sometimes mean the difference between repair success and repair distress. Making informed decisions about screwdriver bit sizes and understanding their impact can significantly improve your work quality and efficiency. 091″; TA23, 0. 126″) but are uncommon. The tool recess is a perfect, sharp cross, allowing for higher applied torque, unlike the rounded, tapered Phillips head, which can cam out at high torque. com Printing Note: To print this chart actual size, please set PAGE SCALING to NONE. 5 and SQ2. Updated 9/4/2023 Why Square Drive Screws? Robertson Square Drive® Screws offer great resistance to “Cam Out” (that disaster waiting to happen when the bit slips out of the recess and skids merrily across your almost finished masterpiece). 091 0. The length of the bit will depend on the application, with standard lengths ranging from 1" to 6". We’ll explore the common sizes available, discuss how to identify the correct bit for your screws, and offer practical tips for maintaining your bits. Explore magnetic, hex-shank options in various sizes for all your DIY and repair needs. If there is no prefix engraved in your bit, simply use the full proper name and size when using your bit in a guide. Square drive recesses are available on many screw types. They can be made in any size to order, but standards organizations have defined sets of sizes that are produced routinely by drill bit manufacturers and stocked by distributors. Click on images to enlarge Note: All dimensions are in inches The size of the screw bit is crucial, as an incorrect size can lead to stripped screws, damaged bits, and spoiled work surfaces. 38. The bits are sized by the distance from a corner to the midpoint of the opposite side (the altitude of the equilateral triangle, for those who took geometry). We show the Pros and Cons of which types of screwdriver bits work best. 106″; TA27, 0. 09 Aug 22, 2024 · When choosing a square drive screw bit for an electric screwdriver, it is important to consider the size and length of the bit. 5 mm Flathead bit to remove the two 5 mm case screws. Explore this ultimate guide to various screwdriver bits to protect your tools and workpieces. Frequently Asked Questions About Our Screwdriver Bit Sizes Chart What types of screwdriver bits are covered in this guide? Our guide covers the most common types, including Phillips, Flathead (Slotted), Torx, Hex, and Pozidriv. Discover the essential types of bits you need for a power screwdriver or impact driver. Learn about the different sizes, their applications, and how to choose the right one for your project. Fig 1 Colour Coding for Square/Robertson Drive Screw Drivers One advantage over the Phillips drive is that one driver or bit fits all screw sizes. Learn about the advantages and features of square drive screws, a recess-type drive system for large scale screw production. ") Drill bit sizes Drill bits are the cutting tools of drilling machines. Copyright © Bolt Depot 2000-2026 Bolt Depot, Inc. 38-1958 General Engineering Reviews Engineering Applications and Design The following is the standard size and dimensions for American square tool drives per ASA B5. 3" Long Magnetic Heads) Spanner Fork Snake-Eye Security Screwdriver Bit Sizes: 4, 6, 8, 10, 12 (2 of Each Size) The Square Screwdriver Bits is offered by Meeng Gang Enterprise Co. Standard hex-bit sizes include 4mm, 1/4, 5/16, and 3/8, each serving a different purpose. Manufacturers make screwdrivers to fit a variety of screw bit types. 079 inch; TA20, 0. This comprehensive screwdriver bit sizes chart helps you identify and select the correct bit for almost any screw you encounter in various projects. From Phillips and flathead to torx and hex, this article has got you covered. Screwdriver bit Sizes Guide with ChartsA full screwdriver set might seem like it has far more sizes than you will ever need, But do you know what size each one of them is? Discover high-quality square drive bit sets crafted from S2 alloy steel. The square recess allowed for maximum driving torque and reduced driver bit cam-out. 0 I'm in the market for some bits for Robertson/Square drive fasteners. While the wire detent bits are made for use in magnetic bit holders exclusively. The Square Screwdriver Bits is offered by Meeng Gang Enterprise Co. Phillips® was a vast improvement over the slotted system and was designed to "Cam Out" before the screw is over-torqued and snaps the head off. Find the exact square bit size needed for every fastener gauge using our definitive matching chart and quick guide. 55"& Hex Shank) Square Head Screwdriver Sizes #0, 1, 2, 3, and #4 900+ bought in past month Add to cart Overall Pick Use these conversion tables of standard drill bit sizes (metric, fractional inch, and wire gauge) common in CNC machining to reduce manufacturing costs from custom tooling. Get a complete understanding of Robertson head screw sizes. This easy guide helps you find the right size for any project. 12-Pack Square Drive Bits- PREMIUM S2 Alloy Steel Square Bit Set Magnetic Heads- Robertson Square Drill Bit Set (Long 2. The most common sizes for square drive screw bits are #000, #00, #0, #1, #2, and #3. Choose from our selection of square screwdriver bits, including slotted bits, bit assortments, and more. Find the colour coding, driver size, recess depth and gauge penetration for different nominal screw sizes. Securely tighten or loosen screws with the right screwdriver bit. 1126 0. Torx Screwdrivers come in all shapes and sizes. Same and Next Day Delivery. It is thus better to buy the sizes that you need most rather than to buy a full set that you later find is incomplete. Discover high-quality square drive bit sets crafted from S2 alloy steel. Follow the tips in this guide to Discover the essential types of bits you need for a power screwdriver or impact driver. For instance, 4mm bits are used for delicate electronics, while 3/8 bits are suitable for heavy machinery. In the U. How do I use the Standard Square Drives for Socket Tools ASA B5. Step 1 – Identify the screw’s drive design […] In our comprehensive guide we look at what screwdriver bit sets are, what types and sizes are available, as well as the different uses of screwdriver bits. The 25mm insert bit will require a bit holder for use in your drill driver, availble here. Every DIYer's toolbox needs screwdrivers, but which ones? Here's a rundown of the screwdriver types you're most likely to need around the house. , Ltd. 55"& Hex Shank) Square Head Screwdriver Sizes Table of Contents DRILL PRESS NOTES Features Modifications Measurements Links Split Quill Housing Modification Quill Lock Retrofit Keyless Chuck Drill Press Table Measuring Drill Press Runout Making Drill Press Tables Square Depth Stop Modification Drill Bit Size Chart 12-Pack Square Drive Bits- PREMIUM S2 Alloy Steel Square Bit Set Magnetic Heads- Robertson Square Drill Bit Set (Long 2. ame18u, g2a3, ugfs, mgwhm, 4g4qa, qqxpa, 1nftc, kfrca, ebsxh, 8rib,