Step drill HSS, round shank For step drilling and deburring of metal and plastic Product benefits High heat resistance for a long service life Special geometry with 3 cutting edges for smooth running and fast progress 90° countersink angle for smooth transitions between steps and for deburring cutting edges Technical data Number of cutting edges: 3 Shank design: Round shank Rotational speed: 1,500 RPM Direction of rotation: Clockwise Other product specifications: With centre point Instructions for use When used on metal, always first make a dimple with a centre punch or pre-drill the hole and always use cutting oil.