Product Specifications Now have wrench-free accessory changes. The Dremel Chuck holds accessories without using a collet eliminating having to use a wrench and creating quick and easy accessory changes. Ideal when the application requires numerous accessory changes. Now have tool-free accessory changes Eliminate the collet and wrench when changing Dremel accessories Accepts all accessory bits with 1/32 In. to 1/8 In. shanks, use with rotary tool models 4000, 400, 3000, 398, 395, 300, 285, 275, 200, 100, 8220, 8200, 800, 780, 770, 7700, 750, 8050 Also use with Dremel attachments 212, 225, and 575 DIMENSIONS Contents: 1 Chuck Warranty: Product Defects Only Used on Model No.: 4000, 400, 3000, 398, 395, 300, 285, 275, 200, 100, 8200, 800, 780, 770, 7700, 750, 8050 Color Code: DimGray Material: Steel