Feature:1. The chuck has a large clamping force, which can be clamped quickly and operated stably.2. The hole diameter and thread have high accuracy, standard size, and it is not easy to fall off after installation.3. The 122mm lengthened design is convenient for installation and removal on tools.4. Made of highquality and highhardness materials, antiimpact and wearresistant, and can be used for a long time.5. Different size specifications have different clamping ranges, which is more practical.Specification:Item Type: Sharpener ChuckModel: 10-16mm Grinding Machine ChuckHardness: HRC40-45Clamping Accuracy: 0.02mmClamping Range: Approx. 10mm / 0.39in, 11mm / 0.43in, 12mm / 0.47in, 13mm / 0.51in, 14mm / 0.55in, 15mm / 0.59in, 16mm / 0.63inCollet Total Length: Approx. 122mm / 4.8inCollet End Diameter: Approx. 20mm / 0.8inTail Thread: M20Tail Thread Length: Approx. 29mm / 1.1inRod Diameter: Approx. 20mm / 0.8in.Package List:1 x 12mmChuckNote: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.2. When changing tools, clean up the impurities inside the jacket in time to ensure the service life of the chuck.