Compatibility: The T-Track clamp kit is compatible with 3018-PRO/3018-MX3/3018-PROVer/1810-PRO CNC router machine, it can hold most of the materials of a desktop CNC router machine. Portable and Practical: Adjustable T Track hold down clamps are very easy to install, can accommodate 30mm materials and hold them firmly in place. Wide Range of Use: Not only suitable for 3018 series desktop CNC router machines, but also suitable for positioning and fixing other woodworking or metalworking,such as drill presses, CNC, table saws, routers, jigs, vertical milling machines, etc. Strong and Sturdy: Made of high quality zinc-aluminum alloy, strong and wear-resistant, long service life. Material:metal colour:Silver Package Contents: 1 set x t track Only the above package content, other products are not included. Note: Light shooting 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.