Step Drill Bit 5Pcs High Speed Steel Cone Step Drill Bit Hole Cutter Blue Coating Triangle Shank Cone Step Drill Bit 5pcs HSS Drill Bits Set Center Punch Storage Box

Specification: Material: High speed steel Surface treatment: Blue coating Shank: Triangle shank Drill Bit Size: 3/16-1/2": (6 steps: 3/16", 1/4", 5/16", 3/8", 7/16", 1/2") 1/4-3/4": (9 steps: 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4") 1/8-1/2": (13 steps: 1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2") 3/16-7/8": (12 steps: 6/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8"? 1/4-1-3/8": (10 steps: 1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-3/8")    Package list: 5 * Step Drill Bits 1 * Automatic Center Punch 1 * Storage Box