Features: 1Eight Size Options: Choose from eight collet sizes ( 0.8mm, 1.2mm, 1.5mm, 1.8mm, 2.0mm, 2.4mm, 3.0mm, 3.2mm) to meet your specific needs, allowing for precise and versatile drilling applications. 2Brass Material: Made from premium brass, these collets are resistant to breakage, lightweight, wear proof, and durable, ensuring long lasting performance. 3Compatibility: Compatible with all for Dremel rotating tools and flex shafts, except discontinued models 1, 2, and 1 series, or earlier 260, 270, and 280 models, providing broad compatibility for various projects. 4Improved Accuracy and Safety: The chuck collet set significantly enhance accuracy by allowing better alignment with drill tools, maintaining stability even at high speeds, resulting in improved work efficiency and safety. 5Complete Set: This kit includes eight 4485 brass collets and two metal nut chucks, providing convenience for daily replacement needs, giving you everything you need in one package. Specification: Item Type: Drill Chuck Collet SetMaterial: BrassWeight: Approx. 21g/ 0.7ozCollet Hole Size: 0.8mm/ 0.03in, 1.2mm/ 0.05in, 1.5mm/ 0.06in, 1.8mm/ 0.07in, 2.0mm/ 0.08in, 2.4mm/ 0.09in, 3.0mm/ 0.12in, 3.2mm/ 0.13in Package List: 2 xChuck8 xCollet