This Foredom micro chuck allows you to use larger, UK standard 3mm shank accessories in a 2.3mm (3/32”) collet handpiece (for instance the Foredom Portable Micromotor 3/32", or the H.20 quick-change hand piece) - without having to change or replace anything! Simply fix the chuck in the handpiece and then fix your accessory into the chuck.
10,000 RPM max speed.
I had few burrs that would only fit my dremmel motor and now I can use them with my jewellery motor which is perfect. I have tried it and works really well.