#4 HSS Black & Gold Quick Change Hex Shank Step Drill Bit (3/16" - 7/8" by 1/16") Shopify Collective Part Number D/ASTCO7/16

Part Number D/ASTCO7/16

Part Number DWDRSD1-1/32

the shank diameter is reduced so the insulation can be molded flush with the tip

Part Number: BIT-DAM18X9/16

#4 HSS Black & Gold Quick Change Hex Shank Step Drill Bit (3/16" - 7/8" by 1/16") Shopify Collective Part Number D/ASTCO7/16Product Description Step drills have single radial concave flutes to create a perfectly round hole in metal, plastic wood and other thin materials without center punching. Constructed of industrial grade high speed molybdenum steel, heat treated and temperature for long life. Self starting tip. No center punching needed. Automatically deburrs top side of hole. Ideal for steel, copper, aluminum and other thin materials. They are Black and gold surface