Features: 1Sizes: There are 8 sizes of brass 4485 collet for you to choose, 0.8mm, 1.2mm, 1.5mm, 1.8mm, 2.0mm, 2.4mm, 3.0mm, 3.2mm. 2Durable: Drill chuck collet set is made of copper material, provides enhanced stability and eliminates the risk of breakage. 3Compatibility for Tools: Compatible for rotary tools and for flex shaft, except for discontinued models 1, 2, and series 1 or earlier of discontinued models 260, 270 and 280. 4Improved Accuracy and Safety: The spare brass chuck significantly improves accuracy and ensures better alignment with tool rotation, enhancing stability and work efficiency. 5Package Includes: Drill chuck collet set includes 8pcs 4485 brass clamps, 1 silver conversion pliers nut, 1 black nut. Specification: Item Type: Drill Chuck Collet SetMaterial: BrassWeight: Approx. 24g / 0.8ozBrass Collet Sizes: 0.8mm / 0.03in, 1.2mm / 0.05in, 1.5mm / 0.06in, 1.8mm / 0.07in, 2mm / 0.08in, 2.4mm / 0.09in, 3mm / 0.12in, 3.2mm / 0.13in Package List: 1 x Black Nut1 x Silver Nut8 xBrass Collet