7 Piece TITANIUM COATED STEEL Flat / Spade Core Drill Bit- Hex Hole Cutters SetFully hardened high carbon steel 2 x grub screws for a firm connection Hex key included For extended reach when using standard flat bits For use with drills, drivers and hand bracesSIZE: L x W x H (mm) 0.06 x 0.02 x 0.355WEIGHT: 0.275680 Loops 7 Piece TITANIUM COATED STEEL Flat / Spade Core Drill Bit Hex Hole Cutters Set in Metallics