This is a set of compression clamps for T-tracks. The bottom of the bolt is T-shaped so it won't slip easily, doesn't rotate with the track, and holds tight.< /p> T-track clamps are useful in many woodworking and metalworking applications for holding, positioning and securing workpieces. T-bolts make it easy to attach wood to drill and any work surface. The T-slot track clamp is made of high quality aluminum alloy, which is hard and wear resistant. breaking. A simple to use part, releasing clamping pressure anywhere along the recessed T-track. Type Rail Clamps have a high pressure clamping effect, slide into the track by T and are quickly secured by turning the knob nut. It can be used to meet your fastener construction requirements. Both the T-bolt and the threaded rod have an 8mm thread. The quick release T-clamp is suitable for a wide range of fixtures and can be used with T-slot rails. Note: The data is all manual measurement, please allow 1 error - 3cm, due to the difference in light and display, there will be a certain color difference, depending on the physical object received.