findmall 7Pcs Square Hole Drill Bit Set Stainless Steel Square Hole Saw Mortise Chisel Drill Bit Tools 6/25, 1/4, 5/16, 3/8, 2/5, 1/2, 9/16 Inch Fit for Mortising Machines Drill
Product Material: Square hole drill bits are made of high-speed steel, Heat treatment, Drill bit has a high hardness, which is not easy to break and break.
Advantage: These woodworking inlay chisels can reduce the labor intensity of construction workers, speed up construction, and reduce construction costs in the construction, installation, renovation, and decoration industries.
Wide Application: Mortise drill bits are suitable for mortising machine or mortising accessories, which can greatly improve the working efficiency of carpenter.