Shark Shim 4 In. L Polypropylene Standard U Shim, Assorted Thicknesses (60-Count) (SH-STU60A)

Designed for shimming in conjunction with a fastener, the SH-STU60A features an integrated retaining comb/clip that fits neatly around a screw or nail to hold the shim firmly in place during and after installation. Built for timber applications across a wide range of first and second fix tasks, these shims are the ideal solution for timber framing, first fix joinery, skirting boards, floorboards, architrave, and much more. The retaining clip eliminates the frustration of shims shifting or falling out during fastening, keeping everything perfectly aligned while you work. Stackable by design, a single pack provides the flexibility to achieve any required shimming height without the need for additional products on site. Color-coded thickness indicators make selection quick and straightforward, allowing you to pick the right shim at a glance and keep the job moving. Whether you are a tradesperson working on a full timber frame build or a home improver tackling skirting boards and architrave, the SH-STU60A delivers the accuracy, stability, and convenience that makes every fix cleaner and more professional.