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3-Flat shank for an extra secure hold in your chuck
Drill America - 3/8-60 UNS HSS Tap Set
Carbon round dies are for use in re-threading existing threads
Choose the Drill America - 1/4-72 UNS HSS Tap Set for unmatched reliability and performance
It's precise and reliable
#4 HSS Black & Gold Step Drill Bit (3/16" - 7/8" by 1/16") - High Performance & Durable Cutting Tool | Drill America Burs & Rotary Files 3-Flat shank for an extraStep 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