Etc | 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 crushing round hole and square headwall one time processing of a square hole and the dust can be broken slag discharged from the |
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Tube | Made of high speed steel Heat treatment HRC48 50 high hardness lengthened core high |
Concentricity | Great for drilling square holes in wood with a mortising machine or a mortising attachment Fits all mortising machines and drill press |
Attachments | It will get a double effect by matched use with mortise and tenon machine The square hole punching needs to use electric drills hammer other tools |
Kcnsieou High Hardness Woodworking Drill Bit Square Hole Chisel Mortising Kit Mortise Tenon Wood Tool Review