Excellent adhesion prevention, with a low friction characteristic of DLC (diamond-like carbon coat) for excellent efficiency and processing of finished surfaces; Cutting material: aluminum alloy, copper alloy; Smooth turning, chamfering, and deburring; Set contents: 6.3, 8.3, 10.4, 12.4, 16.5, 20.5; Surface treatment: DLC coating; 3 blades; Tip: 90° High speed steel (H). SS)