Square Hole Drill Bits for Wood, 4 PCS Woodworking Saw Mortising Chisel Bits,(Size: 6.4mm/8mm/9.5mm/12.7mm)

【Material】These square hole drill bits are made of carbon steel, high hardness, durable and practical, heat treatment, and long life for use.【Labor Saving】This drill bit set helps to reduce the labor intensity of construction workers, speed up the construction speed, and reduce construction costs for construction, installation, renovation, and decoration industries. • 【4 Different Sized Drill Bits】You will get a total of 4 drill bits, which are 6.4mm / 8mm / 9.5mm/ 12.7mm; This mortising chisel bit set is a must-have for home woodworker DIY woodworking . • 【Compatibility】Fits all mortising machines and drill press attachments. • 【Application】Square hole drill bit is mainly used for woodworking aspects.