Ideal for wooden doors or windows Eliminates the need for shims Star Drive Recess for zero stripping Micro-Adjustments allow for plumb installation

Product Description GRK 772691201614 Top Star Adjustable Shim Screws- 3/8" X 3-1/8", 100 Count Box From the Manufacturer GRK’s adjustable Top Star Screw substantially reduces labor when installing windows, door frames, insulation, paneling, built-in wall units and cabinets. This screw works great for both the professional contractor and do-it-yourself installers. Fine adjustments can be made in both directions, helping to reduce the workload and make the job easier for one person.