product description:
Feature: Material:High-speed steel
Hardness:HRC48-50
Size:3/8" (9.5mm),1/2" (12.7mm)
Weight:205grams,210grams
Clamping shank diameter:19mm (Round)
Length:210mm
More details: 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 bits and square outer wall, processing a square hole one-time, 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.
Package Included: 1Pcs * 3/8" Square Hole Drill Bit
1Pcs * 1/2" Square Hole Drill Bit
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