High Quality100% brand new and high quality MaterialStrong alloy material, study and durable to use Save your timeGreatly improve the precision, time-saving and convenient operation It's to installIt's to install and use. High precision, smooth surface, exquisite design PracticalPractical and useful tool for engraving machine Features: 100% brand new and high quality. Strong alloy material, studied and durable to use. Greatly improves accuracy, saves time and makes it easier to use. It is to install and use. High precision, smooth surface, exquisite design. Handy and useful tool for engraving machine. Specification: Condition: 100% Brand New Material: Alloy Color: Black+Red Product size: disc approx. 35 x 19.5mm/1.4 x 0.77in Package weight: approx. 53g Package included: 1 x Engraving Machine Tool How to use: < / p> Connect the cable of this tool control instrument to the tool connector of your machine's control board, then the GND of the control board connects to your router frame (the chassis of the router and the spindle must have connections)