Accepts accessory rotary bits with 1/32-inch(0.8mm) to 1/8-inch(3.2mm) shanks Quick change chucks Only fit for rotary tools,NOT fit for other rotary tools Easy and quick to change accessories replacement on multi tool without changing collets Please note:Only suitable for rotary tool models 275,285,398;Also suitable for models 750,770 and 781 Use with rotary tool models 4000,400,3000,398,300,285,275,200,100,8220,8200,800,780,770,7700,750 Colour:Black Material:Carbide Size:22.6 x 14 x 9.3mm Package Contents: 4pcs x Electric grinder chuck Only the above package content, other products are not included. Note: Light 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. Use with rotary tool models 4000,400,3000,398,300,285,275,200,100,8220,8200,800,780,770,7700,750 Quick change chucks Only fit for rotary tools,NOT fit for other rotary tools Please note:Only suitable for rotary tool models 275,285,398;Also suitable for models 750,770 and 781 Easy and quick to change accessories replacement on multi tool without changing collets Accepts accessory rotary bits with 1/32-inch(0.8mm) to 1/8-inch(3.2mm) shanks