1/2" Black and Gold High Speed Steel drill bits are ideal for production, maintenance and portable drilling jobs. This 1/2" Black and Gold Drill bit is made in the USA. They have a .5000 Decimal Equivalent, 4 1/2" flute length, and 6" Overall Length. The drills are 135 degree split point, surface treated and jobber length. These USA Made Drill Bits are dependable, general purpose drills designed to perform in a broad range of materials including aluminum, iron, stainless steel and other hard metal drilling.  Bisco Tool Supply sells a variety of sizes of Black and Gold fractional drill bits. Please call the Bisco Tool Supply sales staff toll-free at 1-866-247-2635 with any drill bit questions.