Fully hardened and tempered for extended bit life under constant heavy-duty use. The tip is precision formed for proper fit. Use when driving heat-treated or case-hardened screws such as sheet metal, self-tapping or self-drilling.
- Sub-zero tempering process gives these bits long life
- Made of the highest quality S2 tool steel
- 3-1/2 in. #R3 Square Gray Insert Bit - SQ33501