Feature: 1. With high grip and impact resistance, this drill chuck supports strong and clear speed advantage, and it can cut off larger margins and process. 2. Supports convenient replacement method, it just needs to use a wrench to complete the replacement of blade and pad. 3. Reduce the user's tool cost, lathe drill chuck is with good strength and long lifespan, easy to use. 4. Alloy surface of such drill chuck is hardened steel, finished into black by precision grinding. 5. Practicable in various processing environments, such drill chuck has good functions even in very dirty environments such as cast iron. Specification: Item Type: Drill chuck Model: C20-APU13 Clamping Range: Approx. 1 ~ 13mm / 0.04 ~ 0.51in Accuracy: Not more than 0.07mm Material: Alloy surface hardened steel, finished in black by precision grinding. Hardness: HRC 56-58. Package List: 1 x Lathe Drill Chuck