GRK Top Star Adjustable Shim Screw

Item No.: GRK-TOPSTAR For plumb installation of wooden door and window frames. No more shims! Other uses include cabinets, insulation, paneling, and built-in wall units. The two-piece "unique screw within a screw" design reduces labor when installing wooden doors or windows. A unique 2 piece crown/bit allows for quick and easy driving.

Overview

GRK's adjustable Top Star shim screws, is in fact a screw within a screw that allows you to install wooden doors or windows without the use of shims. The quick and easy system reduces labor and allows for hassle-free adjustments to ensure plumb installations. Our product is suited to meet the needs of both professional contractors and weekend warriors making the job easier for one person. Fine adjustments are as simple as the turn of a screw, even after years of use and settling.