The Broadfix U-Shims have been manufactured with a high percentage of post-industrial and post-consumer recycled material. As they are made from plastic they will not swell, shrink or rot and they are completely waterproof. Capable of withstanding higher compressive loads than traditional timber flat packers. This also makes them more economical. They are colour coded depending on size, for easy identification. The ever popular U-Shim is perfect for shimming behind a screw or fixing & ndash loosely install the fixing, and then simply slide the required number of U-Shims over the fixing. The unique comb/clip prevents the U-Shims from falling out, which leaves both hands free to tighten up the fixing. Broadfix U-Shim Mixed Set is supplied in a robust tub, that can be refilled with the bagged range once you run low. Contains the following 210 x Small U-Shims 55 x 43mm 90 x Standard U-Shims 101 x 43mm Various thicknesses 1, 3, 5, 6 and 10mm - colour coded