Features 1、High-precision thread and tapered hole help the drill chuck accurate, reliable and durable. 2、The chuck's shell adopts electrophoretic paint, which can effectively prevent rust in harsh environments. 3、Unique thrust bearing makes such drill chuck easy to convert the key input force into a larger clamping force, and it has strong impact resistance. 4、Because of special treatment of jaw, such chuck is with good wear resistance for use. 5、Compatible with impact drills and various electric tool drills, this CNC tool is very suitable for drilling machines, also it is suitable for aligning, drilling, tapping and reaming operations. Specification Item Type: Drill chuck Material: 40 steel Clamping Range: 0.5-13mm / 1 / 48''-1 / 2'' Package List 1 x Chuck 1 x Wrench 1 x Instruction Manual