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、ADJUSTABLE LIMIT: The countersink chamfer drill bit has adjustable limit to meet various countersinking and hole drilling requirements. 2、WIDE APPLICATION: Can be used for drilling wood, plastic, soft metal, fiberboard, aluminum alloy screws and other material, simple and practical. 3、METAL MATERIAL: The taper drill bit is made of excellent alloy steel, with high hardness, strong wear resistance, and long service life. 4、FAST CHIP REMOVAL: The spiral flute with central bit helps to quickly remove chips, effectively preventing chip clogging and accumulation. 5、EASY : With fine workmanship, this limit countersink drill bit has high accuracy, with wrenches and screw, easy to operate. Specification: Item Type: Countersink Drill Bit Material: Alloy Steel Color: Silver Specification: 3.0 x 8mm Use: For countersinking and tapping wood, plastic, soft metal, fiberboard, aluminum alloy screws, etc. Package List: 1 x Countersink Drill Bit 1 x Wrench 1 x Hex Wrench 1 x Machine Screw 1 x Storage Box Package List 1 x Countersink Drill Bit 1 x Wrench 1 x Hex Wrench 1 x Machine Screw 1 x Storage Box