Set of square woodworking drill bits with steel bearings for mortising machine

Features: 1. The drill bit is forged from bearing steel, resulting in high overall hardness due to heat treatment and a long service life. 2. The U-shaped chip flute design facilitates chip removal and improves drilling efficiency. 3. The drill bit's cutting edge is on a single plane, effectively preventing chipping during initial use. 4. The universal shank design of the drill bit's circular shank ensures a more stable grip. 5. With a high-quality finish, the drill bit can perfectly replace the old one. Specification: Item Type: Square Hole Drill Bits Material: Bearing Steel Model: 11 mm/12 mm/12.5 mm/12.7 mm Application: Suitable for wood products such as MDF, particle board, wood, etc., suitable for square hole drills, square tenon machines. Specification Square Hole Size Shank Diameter Grooving Depth Overall Length Weight 11 mm (approx.) 11 mm/0.4 in 8 mm/0.3 in 60 mm/2.4 in 195 mm/7.7 in 210 g/7.4 oz 12 mm (approx.) 12 mm/0.47 in 10 mm/0.4 in 60 mm/2.4 in 195 mm/7.7 in 220 g/7.8 oz 12.5 mm (approx.) 12.5 mm/0.49 in 10 mm/0.4 in 60 mm/2.4 in 195 mm/7.7 in 220 g/7.8 oz 12.7 mm (approx.) 12.7 mm/0.5 in 10 mm/0.4 in 60 mm/2.4 in 195 mm/7.7 in 220 g/7.8 oz

Package List: 1 x 11 mm Square Hole Drill Bit 1 x 12 mm Square Drill Bit

1 x 12.5 mm Square Drill Bit

1 x 12.7 mm Square Drill Bit