[Duarable & Firm]This universal c-clamp is made of high quality aluminum alloy, with strong struction it can work for long-life, and easy to carry. [ Anti-Slip Design]This small c clamp equipped with non-slip rub rubber pad, the friction is increased and it can effectively prevent falling off. [Adjustable]The desktop mount clamps is adjustable by screw knob, easy to operate. [ for Woodworking]Package with 4pc c-clamps, it can attaches easily to desks, table, carts, , worktables, posts, headrest to the clamps, etc. Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour: Black Material: Aluminum Alloy Package Contents: 4x c-clamps 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.