Grinding Wheels & Points descriptions： We use high-quality raw materials, all materials are very suitable for the product, please rest assured to buy. Power Tools Mini Drill Brass Collet Chuck For Dremel Rotary Tool. Features: Durable and Practical Compatible with Most of Rotary Tools Used in Hardware,hobby,home,etc Suitable for Installation Inside Diameter of Less Than 4.5mm Drill,electric Grinding,hanging Mill,hose Above. Specifications: Color:Gold Material:Brass M7 (4.3mm): Dremel 3000 Overall Length:17mm/0.66'' Shank Diameter :4.3mm/0.17" Clamping Diameter: 0.5mm/0.8mm/1.0mm/1.2mm/1.5mm/1.8mm/2.0mm/2.4mm/3.0mm/3.2mm Package Includes: 10 X Drill Collect Chuck Bits . Products number : SOMONO89787