1x Chisel Bits Square Hole, HSS Mortise Cutter Carpentry Tool

This mortising chisel is ideal for drilling square holes in wood with a mortiser or mortising attachment. Square drill cannot be used on electric drill, square holes must be suitable for square drill (mortise and tenon) to use. Mortise and square tenon hole drilled by the terrible + outer sleeve in the middle of the combination. Reduce the labor intensity of construction workers, speed up construction speed, reduce construction costs for construction, installation, renovation, decoration. Package included: 1x square hole opener or 1x twist drill. Size: 5/8 " (16mm) Features: Material: high speed steel Square hole opening Size: 16mm Application: used for punching wood Package included: 1x square hole opener 1x twist drill.