This is the highly acclaimed line of Permagrit cutting discs
The discs come as 19 mm or 32 mm diameter and 1.8 mm thickness, with a 3 mm shaft.
Designed to replace fragile stone discs. Fits Dremel and other hobby drills. Use to cut piano wire, perspex, all composites, woods, ceramics, stone and vacuumed formed mouldings etc. Running speed 5,000 - 20,000 RPM. Use at 10,000 RPM and slower for cutting perspex, plexiglass, lexan etc. Will not chip or crack material. Recommended by EAA workshops for cutting aircraft canopies.
The carbide surface is almost indestructible as long as you don't try to sand steel, alloy, glass or stone with it!
It can be dry cleaned with a bronze brush when getting dirty.
19 mm disc:
32 mm disc:
The combo comes with one shaft and two discs.