Compatible QuickChange Chuck for Dremel Rotary Tools This quickchange chuck is designed for convenient and efficient accessory changes, eliminating the need for a wrench when swapping bits. It offers precise compatibility with a wide range of Dremel rotary tool models and supports multiple shank sizes, making it a versatile solution for various projects. Key Features Accepts rotary bits with shank sizes from 1/32 inch (0.8 mm) up to 1/8 inch (3.2 mm) for maximum flexibility Compatible with Dremel rotary tool models 275, 285, and 398, as well as models 750, 770, and 781 Suitable for use with Dremel models 4000, 400, 3000, 398, 300, 285, 275, 200, 100, 8220, 8200, 800, 780, 770, 7700, and 750 Quickchange design allows fast and easy accessory swaps without tools Exclusively fits Dremel rotary tools; not compatible with other brands or rotary tool types Benefits and Applications Speeds up project workflow by allowing rapid bit changes Ideal for detailed crafting, precision drilling, and engraving where frequent accessory changes are required for home , hobby work, and professional detailing on wood, metal, or plastic surfaces Example Use Scenarios 1. Crafting and engraving: Quickly adjust between fine engraving tips and polishing wheels when working on decorative wood pieces. 2. DIY repairs: Swap from a cutting wheel to a sanding drum in seconds for efficient home maintenance projects. 3. Model building: Move seamlessly between drill bits and grinding stones when assembling intricate models or prototypes. Built for compatibility, performance, and ease of use, this quickchange chuck is an essential upgrade for Dremel rotary tool users seeking efficiency and precision in their work.