Features 【CLAMPING RANGE】 The clamping range of keyless chuck is 1/32in to 1/8in. Confirm whether the size is appropriate before purchase. 【HIGH STABILITY】 Keyless chuck has high accuracy, can clamp tiny bits more firmly, better align with the rotation of tool, maintain stability under high speed rotation, improve work efficiency. 【INTEGRATED STURCTURE】 Integrated structure design, made from premium alloy, the chuck is more sturdy and safe than the plastic model, built in spring, stable in performance. 【APPLICABLE FOR】 Drill chuck is applicable to all cordless and corded rotary tools for Dremel, including drill bit, grinding wheel, polishing wheel and other light accessories. 【8 SIZES OF COLLETS】The brass collet has 8 sizes for you to choose: 0.8mm, 1.2mm, 1.5mm, 1.8mm, 2.0mm, 2.4mm, 3.0mm, 3.2mm. Please confirm the size before purchase. Specification: Item Type: Drill Chuck Collet Set Material: Metal, Brass Keyless Drill Chuck Clamping Range: Approx. 0.8-3.2mm / 1/32-1/8in Brass Collet Clamping Size: Approx. 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:1 x Drill Chuck8 x Brass Collet1 x Metal Replacement Collet Nut Note:Compatible for Dremel all rotation tools and for Dremel flexible axes. Except for discontinued models 1, 2 and series 1 or earlier versions of discontinued models 260, 270 and 280. Package List 1 x Drill Chuck 8 x Brass Collet 1 x Metal Replacement Collet Nut