The Foredom Micro chuck allows you to use really small drill bits in your 2.3mm (3/32”) collet handpiece - without having to replace 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. Ideal for use with 0.34 - 0.7mm drill bits (#70 - #80).
Use this chuck at a max speed of 10,000 RPM.