The Foredom Micro chuck lets you use smaller, 1.58mm (1/16”) shank accessories in your 2.3mm (3/32”) collet, without having to change the collet.
Place this micro chuck in your 2.3mm (3/32”) handpiece (for instance the Foredom Portable Micromotor 3/32", or the H.20 quick-change hand piece). It works like an adjustable pin vice. For use with 1.58mm (1/16”) accessories.
Use this chuck at a max speed of 20,000 RPM.