A stubby wood beaver drill bit set with high speed steel cutting head. The solution to drilling in nail embedded wood. Designed with all the benefits of the original wood beaver, the Nail-Proof also features a stronger cutting head, allowing it to provide effective drilling even after Nail Strikes. The robust profile of the four precision ground cutting teeth provides extreme resistance to hard objects whilst the HSS cutting head increases durability in tough materials to give longer tool life.- Can be used in nail embedded wood- 1/4 quick-change shank for added convenience and rapid diameter tool change- Up to 25mm can be used within an impact driver- Four deep auger style flutes for rapid chip evacuation and faster drilling speeds- Four precision ground cutting teeth for extreme drilling comfort and balance- Robust cutting tooth profile for extreme resistance to hard objects- High speed steel cutting head increases durability in tough materials for longer life- The compact stubby design is perfect for inter-joist drilling and when working in tight spaces- The compact stubby design is also great for users with larger drilling machines- It includes 1 x 16/20/25mm and 1 x quick-change SDS Plus to 1/4 adaptor