4Pcs Woodworker Square Hole Drill Bits Wood Mortising Chisel Set Mortise Chisel Bit Kits Woodworking Hole Saw Sets with Twist Drill DIY Mortising Chisel Power Tools

★Material:
high-speed steel HRC48-50

★Specification:
1/4" (6.35mm)
5/16" (7.94mm)
3/8" (9.5mm)
1/2" (12.7mm)

Clamping shank diameter:19mm (Round)
Length:210mm

★Feature:
1.Square hole drill is mainly used for woodworking project aspects.
2.To machining square hole, must drill the hole or cutting machine processed crude hole, then chisel detail part by hand.
3.The utility model in the hole drilled by the rotary body, while the impact of the use of hammer impact force transmitted to the outer body, the material.
4.Crushing round hole and square head wall, a one-time processing of a square hole, and the dust can be broken slag discharged from the tube.

★Caution:
To avoid 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.
Sharp heavy drill bits, please keep it away from children

★Package Included:
1pcs x 1/4" Square Hole Drill Bit
1pcs x 5/16" Square Hole Drill Bit
1pcs x 3/8" Square Hole Drill Bit
1pcs x 1/2" Square Hole Drill Bit