Item Type: Collet Replacement <br>Model: 1/2, 1/4, 1/8in Grinding Machine Chuck <br>Hardness: HRC40-45 <br>Clamping Accuracy: 0.02mm <br>Clamping Range: Approx. 3.175mm / 0.1in, 6.35mm / 0.3in, 12.75mm / 0.5in <br>Collet Total Length: Approx. 122mm / 4.8in <br>Collet End Diameter: Approx. 20mm / 0.8in <br>Tail Thread: M20 <br>Tail Thread Length: Approx. 29mm / 1.1in <br>Rod Diameter: Approx. 20mm / 0.8in<br>1、Mount the chuck on the tool of the corresponding diameter, which can be well matched with the hand tool. <br>2、The clamping force is strong, and the clamping accuracy is 0.02mm, which is suitable for fine operation. <br>3、Made of high-quality materials, the hardness is HRC40-45, which is not easy to squeeze and wear. <br>4、The collet size is standard, the thread is accurate, and it is not easy to fall off after installation. <br>5、The collet is integrally formed with a long total length and is suitable for installation on a knife sharpener.1. Put each type of chuck into the corresponding diameter tool to avoid damage to the chuck because the diameter of the tool exceeds the size of the chuck model. <br>2. When changing tools, clean up the impurities inside the jacket in time to ensure the service life of the chuck.1 x 1/4-6.35mm&nbsp;Collet