🚗【Package Included】Come with 4 different size for your choise. Square hole, 1/4"(6.4mm), 5/16"(8mm), 3/8"(9.5mm), 1/2"(12.7mm). Corresponding shank, 7/40"(4.4mm), 2/9"(5.8mm), 17/64"(6.9mm), 3/8"(9.5mm).
🚗【High Performance】These square hole drill bits made of high speed steel, through heat processing, with high hardness drill bits, and sharp-edged square chisel, long life using
🚗【Easy to Use】Woodworking drill bit sets with long drill core and square chisel, easy to lock the hole on the wood, then you can get different mortisers quickly.
🚗【Application】These woodworking morstising chisel bits set are suitable 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.
🚗【Reasonable Desigh】Square Hole Drill Bits are labor saving. Reduce labor intensity of construction workers, speed up the construction speed, reduce construction costs for construction, installation, renovation, decoration industries.