CDIYTOOL Woodworking Square Hole Drill Bits, Wood Mortising Chisel Set Wood Square Hole Mortising Chisel Drill Bits for Mortising Machines and Drill Press

Countersink Drill Bits by CDIYTOOL. Details:Description: 1. These Square hole drill bits are mainly used for woodworking. 2. Drill holes using these drill bits, if you want the square hole become more tidy then you should chisel the detail part by hand. 3. Specification: Material: high-speed steel Hardness: HRC48-50 Drill Size: 1/2 Inch (12.7mm), 1/4 Inch (6.0mm), 5/16 Inch (8mm), 3/8 Inch (9.5mm), 7/16 Inch (11mm) Fit for mortising machines and drill press attachments. Package List: 1 X 1/2 Inch (12.7mm) Drill Bit 1 X 1/4 Inch (6.0mm) Drill Bit 1 X 5/16 Inch (8mm) Drill Bit 1 X 3/8 Inch (9.

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