DIAMETER: This CNC Electronic Handwheel is 80mm Diameter, and 6 Terminal. This hand wheel is convenient to replace the broken on. WIDELY APPLICATION: CNC numerical control system, such as: CNC lathes, CNC grinding machines, CNC milling machines, engraving machines,etc HIGH QUALITY: This handwheel is new and high quality EASY TO USE: This handwheel is easy to install and use. It is made of metal and plastic. It has 6 terminals. 6 TERMINALS CNC PULSE ENCODER: and design, metal gear, smooth rotation, no sticking point position. Handwheel diameter:80mm Input voltage:5V Terminals: 6 terminals Weight: .158g/5.6oz Colour:Silver Material:Metal Package Contents: 1 * CNC Electronic Handwheel Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.