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、Simple Drilling: Supports both wet and dry use, the diamond hole saw ensures easier drilling, hole expanding, chamfering, cutting and more. 2、Extensive Using: Allows for wide application on a variety of materials, including but not limited ceramic tiles, granite, marble, bricks, etc. 3、Smart M14 Shank: Designed to have standard M14 shank, the hole saw drill bit has good stability in high speed, compatible with angle grinder. 4、Great Materials: Combining premium diamond and C45 steel, the hole opener drill bit has sturdy structure, and very for long term use. 5、Easy to Install: Light in weight and compact in size as well, the convenient installation can be quickly completed within several minutes. Specification: Item Type: Diamond Hole Saw Material: C45 Steel Drill Handle: M14 Hole Diameter: Approx. 20mm / 0.79in, 25mm / 0.98in, 35mm / 1.38in, 50mm / 1.97in, 75mm / 2.95in, 100mm / 3.94in. Applicable Machine: Angle Grinder Package List: 6 x Diamond Hole Saw 1 x Storage Box Package List 6 x Diamond Hole Saw 1 x Storage Box