Features: High quality brass collets to fitDremel, other rotary tools, pin vises. 3-jaw chuck compatible forDremel cordless- and corded rotary tools(including drill bits-, sanding drums, polishing wheels and other light-duty accessories. Quick-change keyless chucks holds various accessories with 1/32” to 1/8” shank sizes Sturdy and durable, more safer than plastic models. The 3-jaw chuck is well-made, and the built-in spring is stable and durable. This replacement brass collet provides a big improvement in precision- and holds these tiny bits- far more securely and in better alignment with the rotation- of the tool Specifications: Material: Brass Color: As Pictures Specification: 0.5mm, 0.8mm, 1.0mm, 1.2mm, 1.5mm, 1.8mm, 2.0mm, 2.4mm, 3.0mm, 3.2mm Size:Mixed Weight: 120g Quantity: 15PCS/Set Package Includes: 15PCS x Brass Collet Chucks Kit note: 1. Due to the different monitor- and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2. Please allow slight measuring deviation- due to manual measurement.