Small Cutting Disc 19mm (¾”) dia complete with 3.1mm (1/8”) stainless steel arbor (M3 thread). Kerf / width of cut 2 mm approx. Very controllable, cut a tight radius or straight. Tip:- Cut against the spin for greater accuracy & control. Fits Dremel, Proxxon, Flexi drives & hobby drills. Virtually unbreakable steel cutting discs, tungsten carbide grit welded to the edge. Tough enough to cut piano wire, (aeromodellers use this for under carriage legs) fibreglass, Perspex, PCB, plastics, woods and ceramics. RPM 5,000 – 20,000.