Excellent adhesion prevention, with a low friction characteristic to DLC (diamond-like carbon coat) for superior efficiency and processing of finish surfaces; Cutting material: aluminum alloy, copper alloy; Smooth turning, chamfering, and deburring; Tip diameter: 0.19 inches (4.8 mm); Effective blade diameter: 1.4 inches (37.0 mm); Total length: 3 blades. Tip angle: 9 0° High Speed Steel (HSS)