GRK 772691201614 Top Star Adjustable Shim Screws- 3/8" X 3-1/8", 100 Count Box Product Description 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. 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. Features One crown/bit is included in each Bulk box Eliminates Shims White zinc plated with starhead recess Patented Top Star Shim Screw ISO certified USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.