#4 HSS Black & Gold Step Drill Bit (3/16" - 7/8" by 1/16") - High Performance & Durable Cutting Tool | Drill America Burs & Rotary Files Extra-Large Wipes: Generous 10" x

Extra-Large Wipes: Generous 10" x 12" size provides ample coverage

Carbon round dies are for use in re-threading existing threads

Size: SA-3

Size: SL-6NF

#4 HSS Black & Gold Step Drill Bit (3/16" - 7/8" by 1/16") - High Performance & Durable Cutting Tool | Drill America Burs & Rotary Files Extra-Large Wipes: Generous 10" xStep 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 treated. Product