TEMO M35 Cobalt Spiral Flute Step Drill, 12 size 1/4 Inch Hex Shank

M35 cobalt step drill, 1/4" (6.35mm) hex shank, 12 holes: 3/16" (4.76mm) to 7/8" (22.22mm) 12 HOLE SIZES: 3/16" (4.76mm), 1/4" (6.35mm), 5/16" (7.94mm), 3/8" (9.52mm), 7/16" (11.11mm), 1/2" (12.7mm), 9/16" (14.29mm), 5/8" (15.88mm), 11/16" (17.46mm) , 3/4" (19.05mm), 13/16" (20.64mm), 7/8" (22.22mm) with 1/16" (1.59mm) increments. The size marks are stamped next to each step for easy identification. DOUBLE SPIRAL FLUTES: For more efficient swarf clearance; 1/4 inch hex shank with quick release slot to eliminate slipping; Self-starting for clean holes in thin materials; M35 cobalt HSS to cut stainless steel. The step drill bit is made with M35 cobalt. Ideal for a variety of materials from stainless steel, metal, plastic, fiberglass to wood. They also help to enlarge existing holes. M35 HSSCo is a high speed steel alloy made up of 5% cobalt. M35 is similar to M2, but with 5% cobalt added. M35 COBALT: The addition of cobalt increases heat resistance. It is widely used in metal manufacturi