5pcs HSS Step Cone Drill Bit Set High Speed Steel Hole Cutter

Description: 5pcs HSS Step Cone Drill Bit Set High Speed Steel Hole Cutter Specification: Material: High Speed Steel Quantity: 5pcs/set Size Total Length*Shank Diameter Step 1/4- 1-3/8 inch approx. 70x8mm 10 Steps (1/4'' 3/8" 1/2'' 5/8'' 3/4'' 7/8'' 1'' 1 1/8'' 1 1/4'' 1 3/8'') 3/16- 7/8 inch approx. 70x8mm 12 Steps (3/16'' 1/4'' 5/16'' 3/8'' 7/16'' 1/2'' 9/16'' 5/8'' 11/16'' 3/4'' 13/16'' 7/8'') 1/4- 3/4 inch approx. 66x8mm 9 Steps (1/4'' 5/16'' 3/8'' 7/16'' 1/2'' 9/16'' 5/8'' 11/16'' 3/4'') 1/8- 1/2 inch approx. 70x6mm 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- 1/2 inch approx. 55x6mm 6 Steps (3/16'' 1/4'' 5/16'' 3/8'' 7/16'' 1/2'') Features: This set replaces 50 individual drill bits. The two-flute design gives you faster, smoother cutting. 3-sided (TRI-FLAT) shank will not slip in your drill's chuck. Cobalt coated for smoother cooler cutting. SELF STARTING - No need for a pilot hole. Cobalt coated to reduce friction and run cooler. Large bit has 3-sided shank and small bits have hex shank to prevent slip in drill chuck. Automatically deburrs holes as you drill. Apply to with a clamp or joint drilling machine, suitable for drilling in the hardwood and wood floor, machine screw for the wood screw. Package Included: 1 x 3/16" to 1/2" Step Drill 1 x 1/8" to 1/2" Step Drill 1 x 1/4" to 3/4'' Step Drill 1 x 3/16" to 7/8" Step Drill 1 x 1/4" to 1-3/8" Step Drill Notice: 1. Please allow a bit error due to manual measurement. please make sure you do not mind before you bid. 2. The color may have different as the difference display, pls understand. More Details: