HSS Square Hole Drill Bit Auger Bit Steel Mortising Drilling Craving Woodworking Tools. Mainly used for carpentry, applicable to the construction, installation, decoration, decoration industry use. Features: This Mortising Chisel set is great for drilling square holes in wood Reduce labor intensity of construction workers, speed up the construction speed, reduce construction costs for construction, installation, renovation, decoration industries. Fits mortising attachments with 3/4 "collars Use matters: Square hole drill is mainly used for woodworking aspects. Square hole drilling is used in the square tenon machine, specially used for a drill square hole, it can not be used on electric drill. Specification: Model: 833749 Name: Square Hole Saw Mortising Chisel Material: 45# Steel Square hole size: 6mm, 8mm, 12.5mm
