Feature: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 SetProduct Material: High speed steelCollet 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, ER25-16Product Model: SKER2515PC03Wrench Size: Approx. 8 x 60 x 210mm / 0.3 x 2.4 x 8.3inModelOutside Diameter Approx.Inside Diameter Approx.ER25-226mm / 1in1mm / 0.04inER25-326mm / 1in2mm / 0.08inER25-426mm / 1in3mm / 0.12inER25-526mm / 1in4mm / 0.16inER25-626mm / 1in5mm / 0.2inER25-726mm / 1in6mm / 0.24inER25-826mm / 1in7mm / 0.28inER25-926mm / 1in8mm / 0.31inER25-1026mm / 1in9mm / 0.35inER25-1126mm / 1in10mm / 0.39inER25-1226mm / 1in11mm / 0.43inER25-1326mm / 1in12mm / 0.47inER25-1426mm / 1in13mm / 0.51inER25-1526mm / 1in14mm / 0.55inER25-1626mm / 1in15mm / 0.59in.Package List:1 x ER25-2 Collet1 x ER25-3 Collet1 x ER25-4 Collet1 x ER25-5 Collet1 x ER25-6 Collet1 x ER25-7 Collet1 x ER25-8 Collet1 x ER25-9 Collet1 x ER25-10 Collet1 x ER25-11 Collet1 x ER25-12 Collet1 x ER25-13 Collet1 x ER25-14 Collet1 x ER25-15 Collet1 x ER25-16 Collet 1 x WrenchNote:1. Be sure to keep the size of the collet and extension rod the same.2. Due to manual measurement, please allow an error of 13mm.3. When the tool is inserted into the inner hole of the collet, it must exceed the effective holding length of the inner hole to avoid damage caused by improper use.4.Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.