Includes Sizes: 9/16, 5/8, 11/16, 3/4, 13/16, 7/8, 15/16, 1 – Engineered with superior strength and durability – Ideal for drilling steel, stainless steel, and other tough alloys – Black and Bright surface treatment holds lubricant for smoother drilling, increased heat resistance, and longer tool life – Self-centering 118° split point prevents drill from walking on work piece – Features 3 flatted shank for secure fit in drill chuck – High Speed Steel – Made In USA