This are easy to useThis is highly durableThis is manufactured in China
17-/64", cobalt bit, 135 degree split point to minimize Walk, 8% cobalt for higher heat & abrasion resistance, heavy duty web construction for strength & durability, for tough metal drilling, including heavy duty abrasive, Alloy metal drilling on hardened steel, cast iron & stainless steel, Carded.
Brand: Hanson, Model: 3016017