Features: Made of chrome vanadium steel material, and it has the characteristics of not easy to wear, long service time, and no need for frequent replacement. Installation and disassembly are very simple and fast, and the installation can be completed without too much professional skills. It is compact and easy to carry, you can easily put it in your tool bag for carrying. After the installation is complete, you can convert your water drill machine into an electric drill for use, no need to purchase an electric drill separately, saving you time and money. The clamp rangs is 3.0~16mm, which can be adapted to most water drill machine and has a wide ranges of applications.