[Warm Note] Quick change keyless chucks hold various accessories with 1/32 inch to 1/8 inch shank sizes. Please measure the shank size before purchasing. [Suitable For] 3-jaw chuck compatible with Dremel cordless and corded rotary tools. Works with drill bits, sanding drums, polishing wheels, and other light-duty accessories. [Multiple Choice] Includes eight brass collet sizes: 0.8mm, 1.7mm, 2.1mm, 2.4mm, 2.7mm. Please confirm the size you need before purchasing. [High Quality] Made from durable brass material for improved wear resistance. Plastic nuts may break during use; the all-metal construction helps prevent this issue. Material: Metal Color: Silver Package Contents: 1 set x drill bit kit Note: Light reflection and display differences may cause slight color variation between the image and the actual item. Measurement may vary by +/- 1-3cm.