It can be directly inserted into the aluminum slot hole of any mounting point. The profile connection is one of the most used accessories. It is used for T-slot aluminum extrusions to connect other parts and be connected with T-screw or others. T-Slot nuts allow the user to add clamps to a device without knocking down existing clamps. Colour: Silver material: metal Size: 30mm Specification: M8 Package contents: 10 * T slider Only the above package, 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 allowed measurement error is +/- 1-3cm. LRFR is committed to providing each customer with the highest standard of customer service.