The moisture meter can quickly measure the moisture content of the grain. 1. 15 pieces in 1 set: The set includes 15 pieces of different sizes of ER25 spring bushings, suitable for various fastening scenarios. 2. Good performance: These collets are small and have excellent workmanship, good flexibility and accuracy. 3. Stal: These spring bushings are made of high speed steel metal material, which ma high hardness and wear resistance. 4. With a key: The kit comes with a key for easy installation and adjustment of the handle without any additional tools. 5. Convenient storage: These collets are placed in a plastic box, which is convenient to store and access at any time. Specification: Item Type: Clamp Holder Set Product Material: stal high speed 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 Key size: approx. 8 x 60 x 210mm / 0.3 x 2.4 x 8.3 in Model Outside Diameter Approx. Inner diameter approx. ER25-2 26 mm / 1 in 1 mm / 0.04 in ER25-3 26 mm / 1 in 2 mm / 0.08 in ER25-4 26 mm / 1 in 3 mm / 0.12 in ER25-5 26 mm / 1 in 4 mm / 0.16 in ER25-6 26 mm / 1 in 5 mm / 0.2 in ER25-7 26 mm / 1 in 6 mm / 0.24 in ER25-8 26 mm / 1 in 7 mm / 0.28 in ER25-9 26 mm / 1 in 8 mm / 0.31 in ER25-10 26 mm / 1 in 9 mm / 0.35 in ER25-11 26 mm / 1 in 10 mm / 0.39 in ER25-12 26 mm / 1 in 11 mm / 0.43 in ER25-13 26 mm / 1 in 12 mm / 0.47 in ER25-14 26 mm / 1 in 13 mm / 0.51 in ER25-15 26 mm / 1 in 14 mm / 0.55 in ER25-16 26 mm / 1 in 15 mm / 0.59 in List of packages: 1 x ER25-2 clamping sleeve 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 Key Note: 1. Make sure the size of the collet and extension cord is sam.2. When the tool is inserted into the inner hole of the collet, it must exceed the effective length of holding the inner hole to avoid damage caused by improper use. 4. Installation steps:1. First, confirm the size of the tool, in particular the diameter of the tool holder and the diameter of the collet; 2. Then insert the CNC tool into the collet, if it turns out to be tight or loose, confirm the size; 3. After fixing the tool and collet, place the sleeve in the appropriate extension rod. As in the first step, confirm whether the size matches. If it does not fit, do not use it, otherwise accidents will easily occur or there will be a workpiece size error.