Stackable wedge shaped shims are ideal for installations, adjustments, and general maintenance. Interlocking horizontal and vertical ridges keep shims in place and allow for small, precise adjustments . Made from thermoplastic polymer, they won’t break down, shrink or swell in damp and humid conditions like wood shims. Tough and durable. Glue resistant, useful as a clamping pad on angled surfaces. Shims are 2.36″ wide by 3.54″ long.it is available in 8 sets of 2.