7Pcs HSS Woodworking Square Drill Bits Mortising Chisel Set 1/4 5/16 3/8 2/5 1/2 9/16 5/8 Inch

General Description This square drill bit set includes 7 pieces, perfect for meeting various wood drilling needs. Made from heat-treated high speed steel (HSS), these drill bits provide high hardness and long life. They are ideal for drilling square holes with a mortise machine or mortise accessories, and feature nicely square chisels to improve your work efficiency. Technical Specifications Item Type: Woodworking Square Drill Bits Material: HSS Hole Drilling Size: 6.4mm (1/4inch), 8.0mm (5/16inch), 9.5mm (3/8inch), 10mm (2/5inch), 12.7mm (1/2inch), 14mm (9/16inch), 16mm (5/8inch) Compatibility and Accessories Compatible with mortise machines Includes 7 square drill bits and 7 storage boxes