#3 HSS Black & Gold Quick Change Hex Shank Step Drill Bit (1/4" - 3/4" by 1/16") Quantity:1 They are made from M42

They are made from M42 8% cobalt and are manufactured to NAS 965 Type "D" specifications

Part Number DEW1X6

Part Number: Assortment Kit #116575 Pieces - Coarse Thread

Part Number DWTST1/2-14P

Part Number DWDRSD24

#3 HSS Black & Gold Quick Change Hex Shank Step Drill Bit (1/4" - 3/4" by 1/16") Quantity:1 They are made from M42Product 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