Features: 1. This Mortising Chisel is great for drilling square holes in wood with a mortising machine or a mortising attachment. 2. Square hole drill can not be used on an electric drill, drill square holes need to fit a square hole drill drilling (mortise and tenon machine) to use.
Use matters:Square hole drill is mainly used for woodworking aspects. 1. To machining square hole, must drill the hole or cutting machine processed crude hole, then chisel made from artificial hand.