[Premium Material] The office chair saver is made of quality Material, quality and reliable, not easy to break; Compared with plastic saver, our chair saver can offer you with a long term use. [ Design] The screw of the tool to prevent the chair from sinking can be adjusted according to different chairs. At the same time, if the cylinder fails, this office chair clip can also fix the chair from sinking, which greatly saves the cost of buying a chair. [Easy to Use] This chair fixing tool is very easy to install. Just adjust the height of the chair you want before installation, unscrew the screw, install the clip on the column, put in the screw and tighten it with a wrench, the clip can be firmly fixed on the column. [Wide Application] The office chair piston is suitable for a variety of chairs, you can apply them , school, office, restaurant, cafe, bar and other places, helping to fix the office chairs. [Package Content] You receive 3pcs 25-28mm/0.98-1.1inch chair fixing tool and 3 hex wrench installation tool. The office chair gas lift cylinder bracket, equipped with silicone gasket to effectively fix the chair to prevent sinking, with a wrench tool for easy installation. Colour:Silver & Blue Material:steel Package Contents: 3 * chair fixing tool 3 * wrench 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.