Square Hole Drill Bit Sets, 7Pcs Woodworking HSS Wood Mortising Chisel Countersink Bits Hole Mortise Drill Bit Set, 6.4mm 8mm 9.5mm 12.7mm 14mm 16mm 19mm

• Drills precise holes with little pressure: Using different specifications of the square hole drill, matching the appropriate power of the square hole machine, you can play a square hole to meet the requirements: 1/4 Inch (6.4mm), 5/16 Inch (8mm), 3/8 Inch (9.5mm), 1/2 Inch (12.7mm), 9/16 Inch (14mm) 5/8inch(16mm), 3/4inch(19mm).
• High Efficiency and Labor Saving: square wood chisel drill bits with standard chip design, easy to remove the side of wood chips, improve drilling efficiency. Reduces the labor intensity of construction workers, accelerates construction speed, reduces construction costs for construction, installation, renovation, decoration.
• MATERIAL: This square mortising chisel set is made of special steel, heat treatment, HRC48-50, offers high hardness, lengthened core, and high concentricity.
• Fit Machine: Great for drilling square holes in wood with a mortising machine or a mortising attachment. Fits all mortising machines and drill press attachments. Square hole drill is mainly used for woodworking aspects.
• DESIGNED: Professional Great for drilling square holes in wood with a mortising machine or a mortising attachment.Fits all mortising machines and drill press attachments. Square hole drill is mainly used for woodworking aspects.

Specification: Material: high-speed steel Special steel, heat treatment, HRC48~50, high hardness, lengthened core, high concentricity. Hardness: HRC48-50 Size: 1/4 Inch (6.4mm), 5/16 Inch (8mm), 3/8 Inch (9.5mm), 1/2 Inch (12.7mm), 9/16 Inch (14mm) 5/8inch(16mm), 3/4inch(19mm) Clamping shank diameter: 19mm (Round) Shaft length ( Drilling depth ): 1/4"(6.4mm): 47mm 5/16"(8mm): 51mm 3/8"(9.5mm): 54mm 1/2"(12.7mm): 75mm 9/16"(14mm): 75mm 5/8"(16mm): 75mm 3/4"(19mm):75mm