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. To avoid the drill bits become overheated and get burned up due to fast rotary friction, we suggest use some cutting fluid to keep the bits cold during usage.
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 (9.5mm) Drill Bit
1 X 7/16 Inch (11mm) Drill Bit
Note:
Please allow slight deviation due to manual measurement