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、APPLICABLE MATERIALS: Coring bits are designed for dry or wet drilled tiles, granite, marble, bricks and all similar materials 2、FOR REAMING: Finger drill bits are used to enlarge, shape or fillet existing holes in porcelain, marble, granite and hard ceramics 3、STABLE AND : Vacuum brazing technology provides a longer service life, bring fast and smooth drilling 4、STURDY MATERIAL: The tile installation kit is made of excellent No. 45 steel with vacuum brazed diamond technology, which is robust and extremely efficient 5、PORTABLE AND CONVENIENT: The drill shank is M14, suitable for Angle grinders. Comes with a converter head and storage box for easy installation and carrying Specification: Item Type: Diamond Hole Saw Kit Material: No. 45 steel Drill Shank: M14 Punch Diameter: Approx. 6mm / 0.24in 8mm / 0.31in 10mm / 0.39in 16mm / 0.63in 20mm / 0.79in 25mm / 0.98in 32mm / 1.26in 50mm / 1.97in Applicable Machine: Angle grinder Package List: 9 x Drill Bit 1 x Converter Head 1 x Storage Box Package List 9 x Drill Bit 1 x Converter Head 1 x Storage Box