Accepts accessory rotary bits with 1/32-inch(0.8mm) to 1/8-inch(3.2mm) shanksQuick change chucks Only fit for Dremel rotary tools,NOT fit for other rotary toolsEasy and quick to change accessories replacement on Dremel multi tool without changing colletsPlease note:Only suitable for Dremel rotary tool models 275,285,398;Also suitable for models 750,770 and 781Use with rotary tool models 4000,400,3000,398,300,285,275,200,100,8220,8200,800,780,770,7700,750Colour:BlackMaterial:CarbideSize:22.6*14*9.3mmPackage Contents:2pcs * Electric grinder chuckOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.