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、Quick Cutting: 160mm size together with incisive blade enables high drilling speed as well as clean cutting edge. 2、Efficient Use: Ensuring accurate positioning and stable working performance, this hole saw has higher efficiency. 3、Broad Utility: Can be extensively applied on concrete, brick, wall, stone, installation and many other materials. 4、Good Material: Made of premium cemented carbide material with good hardness, with wearing and long uses. 5、Easy to Install: Light in weight and compact in size, the simple replacement can be quickly completed in minutes. Specification: Item Type: Hole Saw Material: Cemented Carbide Colour: Silver Specification: Approx. 160mm / 6.3in Application: Widely used for cutting clean holes in concrete, brick work, drilling wall, stone, installing air conditioners, etc. Package List: 1 x Hole Saw Note: Please allow a small error of 1？2cm in the manual measurement. Package List 1 x Hole Saw