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、Diamond blades are sharp, hard and wear？resistant, and have a long service life. 2、The oval chip hole design is more conducive to the discharge of chips, and the cutting resistance is small. 3、Wide application range, can applied to marble, concrete, artificial stone, etc. 4、Sophisticated production, excellent performance, can be used for a long time, more in line with your needs. 5、Easy to carry and install, and it can bring more convenience to your work. Specification: Condition: 100% Brand New Item Type: Diamond Drill Bit Material: Diamond Color: Blue Process: Sintering Optional Opening Diameter: Approx. 55mm/2.2in, 60mm/2.4in, 65mm/2.6in Optional Diamond Drill Bit Specification: Approx. 55mm/2.2in, 60mm/2.4in, 65mm/2.6in Applicable Equipment: Electric Drill, Bench Drill Scope of Application: Core holes for marble, concrete, artificial stone, granite and other materials. Package List: 1 x Diamond Drill Bit Package List 1 x Diamond Drill Bit