#1 Square Drive Bit 25mm

This range of driver bits covers #1 and #2 Square Drive fittings in 25mm and 50mm lengths, built for repeatable driving in trade and workshop use. Each bit fits a standard 1/4" hex power tool holder or bit driver, making it a straightforward addition to a driver bit set or a direct swap for a worn bit.

The precision-ground tip sits snugly in the fastener head to reduce cam-out and stripped drives, holding up under repeated use across trade, workshop and maintenance tasks.

At a glance

• Trade and workshop use — repeated driving of Square Drive fasteners across assembly, production and field work
• Driver bit sets — building out or topping up a bit set with the sizes you're missing
• Worn bit replacement — a direct swap when a bit's tip rounds out or strips

Full specifications, applications and features are in the tabs below.