HSS Mortising Chisel Set， Ankoow 4Pcs Woodworking Square Drill Bits Wood Hole Saw with Twist Drill (1/4-Inch， 5/16-Inch， 3/8-Inch， 1/2-Inch)[Product Information]- ❣. 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. Square hole drill is mainly used for woodworking aspects.
- ❣. It will get double effect by matched use with mortise and tenon machine.The square hole punching needs to use electric drill， hammer & other tools.
- ❣. Reduce labor intensity of construction workers， speed up the construction speed， reduce construction costs for construction， installation， renovation， decoration industries.
