Great upgrade from the standard clamps included with CNC 3018 / CNC 3040 series and other DIY CNC machines. Compatible with MDF spoil boards and aluminum spoil boards that accommodate M6 T-slot nuts. Working range: The clamp accommodates materials up to 40mm thick and features easy-to-tighten knobs for quick installation or removal of stock material. Sturdy quality: Constructed of high-strength aluminum alloy with high durability and wear resistance. Versatility: Spring-loaded and capable of exceptional clamping force, this clamp is a perfect addition to any universal T-track system configuration or assembly. Ideal for workholding, positioning, and fixturing for woodworking or metalworking applications, including routers, drill presses, CNC machines, table saws, jigs, panels, and vertical mills. Note: The actual product may have slight color variations due to lighting and display differences, which do not affect functionality. Color: Silver Material: Aluminum alloy Package contents: 2x Mini Hold Down Clamps Only the above package content is included; other items are not part of this package. Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the real thing. Measurement may vary by +/- 1-3cm.