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、The main body of this hole saw is made of cemented carbide, which effectively extends the service life. 2、Can make holes in steel plates, iron plates, stainless steel plates, aluminum plates, calcium silicate plates, plastic plates, resin plates, and FRP plates. 3、This cutting edge is incisive, the opening is neat and glossy without broken edges, and the cutting resistance is small. 4、Thefront and rear inclination angle tooth shape design, low resistance and strong perforation ability. 5、This hole saw can be compatible with a variety of materials and work more efficiently. Specification: Item Type: Carbide Hole Saw Material: Carbide Purpose: To make holes in steel plate, iron plate, stainless steel, aluminum plate, calcium silicate plate, plastic plate, resin plate, FRP plate Plate Cutting Thickness: Approx. m / 0.1in Total Length: Approx. 88mm / 3.5in Inner Wall Thickness: Approx. 20mm / 0.8in Shank Diameter: Approx. 9.8mm / 0.4in Hole Diameter Specification: Approx. 50mm / 2in 51mm / 2.01in 5m / 2.1in 55mm / 2.2in 60mm / 2.4in 65mm / 2.6in 70mm / 2.8in 75mm / 3in 80mm / 3.1in 85mm / 3.3in 90mm / 3.5in 95mm / 3.7in 100mm / 3.9in Package List: 1 x Hole Saw 1 x Spring 1 x Hex Wrench Note: Not suitable for electric drills and impact drills, as well as materials such as tiles, concrete, wall, and stones. Package List 1 x Hole Saw 1 x Spring 1 x Hex Wrench