-High Quality HSS Material Construction. -135 Degree Split Point -Black & Silver Surface Treatment Holds Lubricant For Smoother Drilling -1/2" Shank -Length on all bits is 6" -Sizes: 1/2", 17/32", 9/16", 19/32", 5/8", 21/32", 11/16", 23/32", 3/4", 25/32", 13/16", 27/32", 7/8", 29/32", 15/16", 31/32" & 1"