A true multi-function tool, combination drill/mills allow plunging, slotting and/or top chamfering all in one tool saving you the cost of extra tools plus indexing time. Premium aluminum titanium nitride (Altin) coating provides Quantum increases in productivity, either in terms of speed or longevity, with or without coolant, #51690, (D) diameter 1/8, (b) Cutting height 1/2, (D) shank 1/8, overall length (L) 1-1/2, B1 1/16, max RPM 28, 000, flutes 4, 51690 High performance CNC solid carbide 90 degree 'V' Spiral drills with Altin coating 4-flute x 1/8 dia x 1/2 x 1/8 shank x 1-1/2 inch long Up-cut router bit/end mill