pMorse Single End Mill, Ball Nose Center Cutting Miniature Regular Length, Series 5915T, 0045 in Cutter Dia, 112 in Overall Length, 0135 in Maximum Depth of Cut, 2 Flutes, Helix Flute, 18 in Shank Dia, 30 deg Helix Angle, Micrograin Solid Carbide, AlTiN Coatedp.