• Material: These square hole drill bits made of High-carbon steel, through heat processing, with high hardness drill bits, and sharp-edged square chisel, long life
• Size: Come with 3 different sizes for your choose, 9/16"(14mm), 5/8"(16mm), 3/4"(19mm). These long square drill bits set can meet most of your needs.
• High working efficiency: 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. Also, it is labor saving.
• Available application: These woodworking morstising chisel bits set are suitable for drilling square holes in wood with a mortising machine or a mortising attachment. Also, it fit for electric drill, hammer & other tools.
• Reduce labor intensity of construction workers, speed up the construction speed, reduce construction costs for construction, installation, renovation, decoration industries. B0814BRMXG