When you work long hours, your back can hurt from bending over, but if you install these table leg extenders on your folding table, you can work long hours without back hurting. These adjustable table legs will raise your table to the height of your choice, giving it more storage space underneath. - 4 Sides Reinforce Without Shaking :Unlike other brands, we also install reinforcement bolts on all four sides of the top of the square folding table leg risers, four sides reinforcement can make the table not skew more stable without wobbling. These table height extenders come with rubber feet to prevent sliding and ensure the stability of the table. - Double B-type Locking Pins Design : Compared with other brands, our square table height extenders adopts double B-type locking pins design, easy to install, can be easily adjusted to the height you want, stronger load-bearing capacity, twice as much as other brands, you can rest assured that you can use it. - Materials : These table leg extenders are made of high-quality, heavy-duty thick steel