Used to drill very short, shallow holes in hard (or hardened) steel. They can be used either in CNC or drill presses, #51682, (D) diameter 1/8, (b) Cutting height 7/16, (D) shank 1/8, overall length (L) 1-1/2, flutes 2, 51682 CNC solid carbide 118 degree point Spade drill 1/8 dia x 7/16 x 1/8 shank router bit