Both discs can be used at a running speed or 5,000-20,000 RPM. Use at 10,000 RPM and slower for cutting perspex, Plexiglass, Lexan etc. They will not chip or crack material.
19 mm cutting disc:
Width of cut: 1.8mm. Centre hole: 3mm.
Diameter: 3.1mm; arbor: 1/8".
32 mm cutting disc:
Width of cut: 1.8mm. Centre hole: 3mm.
Diameter: 3.1mm (1/8").