High-quality brass collets and a versatile keyless chuck for reliable rotary-tool performance Key benefits Durable construction: Collets are made from premium brass alloy for higher hardness and wear resistance, reducing the risk of breakage during regular use. Secure, accurate grip: The 4-claw brass collets eliminate blind zones in the clamping path and securely hold small bits even at high speeds, minimizing bit wobble and slippage. Versatile sizing: The set offers fine size coverage so you can match bits precisely and maintain concentricity. What’s included and specifications Collet set: 8 sizes of 4-claw brass collets — diameters: 0.8 mm, 1.2 mm, 1.5 mm, 1.8 mm, 2.0 mm, 2.4 mm, 3.0 mm, 3.2 mm. Chuck: 3-jaw keyless chuck that accommodates accessory shanks from 1/32" to 1/8". Compatibility and performance Compatible with most rotary tools and accessories. Works with cordless and wired rotary tools, drills, grinding drums, polishing wheels, and similar rotating attachments. Brass construction provides consistent clamping and long-lasting performance under frequent use. Practical applications Electronics and PCB work: Securely hold small-diameter drill bits for clean, precise holes. Hobby and model making: Reliable grip for carving, sanding, and detailing small parts at high speed. Metal and jewelry finishing: Stable clamping for polishing, grinding, and shaping fine components. Why choose this set Precision fit across common small-bit sizes improves tool control and finish quality. Brass collets reduce wear and maintain a dependable clamping action over time. The keyless 3-jaw chuck accepts a wide range of shank sizes for quick changes and broad accessory compatibility. Note: Sizes and compatibility follow the product specifications listed above; ensure your rotary tool supports the chuck and collet dimensions before use.