Features High Quality 5V 1-Channel Relay Module: This module offers high-quality performance with a 5V power supply and 1-channel bistable self-locking relay, ensuring reliable and efficient . Convenient Trigger Control: Easily activate the relay by clicking the trigger port to pull it in and hold, and click again to disconnect, providing convenient and intuitive control. and Long Service Life: Constructed with high-quality materials, this relay module is and has a long service life, ensuring lasting reliability for your applications. High Accuracy and Strong Stability: With high accuracy and strong stability, this relay module is easy to install and use, delivering and reliable performance for various applications. Safe Low Pulse Trigger: The trigger mode is a low pulse trigger, providing a more convenient and safer for your peace of mind. Features: 1、Large Torsion: The bearing calendar is high, effectively preventing slipping and clamping more stable 2、Rugged and : Not easy to break the handle, improve work efficiency, achieve high and glossy cutting, without curling. 3、Fast: The drilling speed is fast, the hole diameter is round and there is no nick, and the maximum drilling effect is achieved. 4、Labor Saving: The design of the cut out is larger, which reduces the resistance when opening the hole. 5、Applicability: This diamond hole saw bit can be used to remove rings on glass, marble, ceramic tiles, ceramics, PVC or other materials. Specification: Item Type: Diamond Drill Bits Material: Diamond Specification: Approx. m / 0.12in, 4mm / 0.16in, 5mm / 0.2in, 6mm / 0.24in, 8mm / 0.3in, 10mm / 0.39in, 12mm / 0.47in, 18mm / 0.71in, 32mm / 1.26in, 50mm / 1.97in Package List: 10 x Hole Opener Package List 10 x Hole Opener