Features 1、15Pcs in 1 Set: The kit contains 15pcs of different sizes of ER25 spring collets, suitable for different clamping scenarios. 2、Good Performance: These collets are small in size, and has fine workmanship, with good elasticity and accuracy. 3、High Speed Steel: These spring collets are made of high speed steel metal material, which has high hardness and wear resistance. 4、With Wrench: The kit is equipped with a wrench for easy installation and adjustment of the chuck without additional tools. 5、Convenient Storage: These collets are placed in a plastic box, which is convenient for storing and accessing at any time. Specification Item Type: Collet Chuck Set Product Material: High speed steel Collet Model: ER25-2, ER25-3, ER25-4, ER25-5, ER25-6, ER25-7, ER25-8, ER25-9, ER25-10, ER25-11, ER25-12, ER25-13, ER25-14, ER25-15, ER25-16 Product Model: SKER2515PC03 Wrench Size: Approx. 8 x 60 x 210mm / 0.3 x 2.4 x 8.3in Model Outside Diameter Approx. Inside Diameter Approx. ER25-2 26mm / 1in 1mm / 0.04in ER25-3 26mm / 1in 2mm / 0.08in ER25-4 26mm / 1in 3mm / 0.12in ER25-5 26mm / 1in 4mm / 0.16in ER25-6 26mm / 1in 5mm / 0.2in ER25-7 26mm / 1in 6mm / 0.24in ER25-8 26mm / 1in 7mm / 0.28in ER25-9 26mm / 1in 8mm / 0.31in ER25-10 26mm / 1in 9mm / 0.35in ER25-11 26mm / 1in 10mm / 0.39in ER25-12 26mm / 1in 11mm / 0.43in ER25-13 26mm / 1in 12mm / 0.47in ER25-14 26mm / 1in 13mm / 0.51in ER25-15 26mm / 1in 14mm / 0.55in ER25-16 26mm / 1in 15mm / 0.59in Package List 1 x ER25-2 Collet 1 x ER25-3 Collet 1 x ER25-4 Collet 1 x ER25-5 Collet 1 x ER25-6 Collet 1 x ER25-7 Collet 1 x ER25-8 Collet 1 x ER25-9 Collet 1 x ER25-10 Collet 1 x ER25-11 Collet 1 x ER25-12 Collet 1 x ER25-13 Collet 1 x ER25-14 Collet 1 x ER25-15 Collet 1 x ER25-16 Collet 1 x Wrench