6 mm Coarse Grained Diamond Point Set 20 pcs Application: Suitable for most rotary tools like dremel, die grinder etc. Widely used in grinding/polishing process of jade/metal/stone etc. production. 1. Surface polishing, edge trimming, teeth grinding; 2. Various machine parts chamfering, grooving; 3. Trimming or cleaning the inner hole or tube, surface of machine parts. Specification: Shank diameter: 6 mm & Overall Length: 60 mm