Its reinforced shank provides better tolerances, generates less play, and offers greater accuracy. It also allows for better guidance thanks to the center drill. The unique keyless system requires only a simple click to remove the hole saw, allowing quick and easy ejection of the drill core. This system can be used as a keyless connection between power tools and hole saws. It is suitable for all cordless and mains-powered drill bits. Diameter: 8.7 mm.