Simpson #2 Undersized Square Quik-Drive Driver Bits by Simpson are purpose-built replacement driver bits designed to deliver consistent, reliable performance with Quik-Drive screw driving systems. The #2 undersized square drive profile ensures a secure fit with compatible Quik-Drive screws, reducing cam-out and driver wear so fastening stays controlled and efficient - whether you are working with deck boards, subfloor panels, or other demanding applications. Keeping the right square drive bit on hand means your Quik-Drive system keeps running at full performance without interruption.

Key Features

• #2 Square, Undersized drive type - the undersized profile is engineered specifically for Quik-Drive screw compatibility, providing a tighter engagement that reduces slipping and extends usable bit life compared to a standard #2 square bit
• Designed as Quik-Drive replacement bits - variations in material hardness and driving technique naturally wear bits over time; having purpose-matched replacement bits on hand eliminates downtime and keeps your system driving screws at full efficiency
• Sold individually (each unit) - lets you replenish your supply precisely as needed, without overstocking, so you always have the correct bit available for your specific Quik-Drive screw selection
• Reference-matched selection - correct bit selection is critical for optimum Quik-Drive results; always cross-reference the bit label included in your screw box or the screw box label itself to confirm the right driver bit for your application

Why This Product

• The #2 undersized square drive geometry is specifically matched to Quik-Drive screw heads, giving you a more secure bit-to-screw connection than a generic driver bit - which translates directly to fewer stripped heads and less wasted material on the job
• Driver bit wear is inevitable with high-volume screw driving; having replacement bits available means your Quik-Drive system never becomes the bottleneck - you can swap quickly and continue working without stopping to source parts
• Correct bit selection - matching the bit to the specific Quik-Drive screw in use - is the single most important factor in protecting both the screw head and the driver collator, making this an investment in equipment longevity as well as fastening quality
• Simpson's engineering of this bit to undersized tolerances reflects the precision that Quik-Drive systems require, ensuring reliable screw seating depth and consistent drive performance across varying wood densities and material conditions

Specifications

• Brand: Simpson Strong-Tie
• Drive Type: #2 Square, Undersized
• Country of Origin: Taiwan

Available Pack Options

• BIT2SU-RC3: 3 Pk
• BIT2SU-RC10: 10 Pk

Frequently Asked Questions

What does "undersized" mean for a #2 square drive bit?

An undersized #2 square drive bit has a slightly tighter dimensional profile than a standard #2 square bit. This tighter fit is engineered specifically for Quik-Drive screw heads, providing more secure engagement, reducing cam-out, and helping extend overall bit life during high-volume driving applications.

How do I know which driver bit to use with my Quik-Drive screws?

Always reference the label on the driver bit that came packaged with your Quik-Drive screws, or check the screw box label itself. Using the correctly matched bit is essential to achieve optimum driving results and to protect both the screw heads and your Quik-Drive collator from premature wear.

When should I replace my Quik-Drive driver bit?

The driver bit included with each box of Quik-Drive screws is designed to last through that box under normal conditions. However, variations in material hardness and driving technique can shorten bit life. If you notice cam-out, incomplete seating, or increased driving difficulty, the bit should be replaced to maintain consistent, quality results.

Can I use a generic #2 square bit instead of this undersized version?

For best results with a Quik-Drive system, it is important to use the bit specified for your particular Quik-Drive screws. The undersized square drive profile is purpose-matched to the screw head geometry - using a non-specified bit may result in reduced engagement, stripped screw heads, or accelerated bit wear. Always confirm the correct bit type by checking your screw box label.