ALL-CARB 6Pcs Square Hole Drill Bit HSS Square Hole Saw Mortise Chisel Drill Bit Tools Wood Mortising Chisel Set Twist Drill Wood Hole Drilling Tool for Mortising Machines Drill Press Attachments

Application Compatibility - for woodworking. Such as manual diy wood slotting wood mortising furniture production. Widely used - professional wooden drill which needs to be used with professional square hole drill is not suitable for manual drilling and bench drilling. Package Includes 1 X 1/4 Inch (6.4mm) Drill Bit 1 X 5/16 Inch (8.0mm) Drill Bit 1 X 3/8 Inch (9.5mm) Drill Bit 1 X 1/2 Inch (12.7mm) Drill Bit 1 X 9/16 Inch (14mm) Drill Bit 1 X 5/8 Inch (16mm) Drill Bit Sharp blade The square hole drill blade is sharp and more efficient. It is made of high-speed steel and is not easy to break. Design of groove The square hole drill is provided with a chip removal groove which is convenient for the wood chips to be discharged and the chip removal is faster and more efficient. Durable The drill bit is integrally formed and processed by heat treatment. It is firm and durable. The force on the drill bit sleeve edge is uniform reducing damage and extending service life.