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、BENDING RESISTANT AND WEAR RESISTANT: The hole sink drill is made of excellent alloy steel through accurate machining of high accuracy equipment, bring good chip removal effect, strong bending resistance, wear resistance, and 2、 MATERIAL: The structure design of the drill bit is reasonable, the chamfer is made of No.45 steel, beautiful and , with excellent quality and detail 3、FAST AND EFFICIENT: A spiral groove with a central bit will quickly drain debris from the hole, which can effectively prevent the accumulation of debris retention and improve drilling efficiency 4、APPLICABLE SCENARIO: Countersink drill bit can be used in wood, plastic, soft metal, fiberboard, aluminum alloy screw countersink hole, hole opening, etc. 5、WITH FITTINGS: Countersink drill bit kit contains wrenches, hex wrenches, set screws and storage boxes, convenient for your use and storage Specification: Item Type: Countersink Drill Bit Material: Alloy steel Color: Silver Size: Approx. 2.8 x 10mm / 0.11 x 0.39in Application: Used for wood, plastic, soft metal, fiberboard, aluminum alloy screw countersink hole, hole opening, etc. Package List: 1 x Limit Countersink Drill Bit 1 x Wrench 1 x Hex Wrench 1 x Set Screw 1 x Storage Box Package List 1 x Limit Countersink Drill Bit 1 x Wrench 1 x Hex Wrench 1 x Set Screw 1 x Storage Box