Top Star Shim Screws
GRK’s adjustable screw, the Top Star™ reduces labor substantially for the installation of window and door frames, insulation and paneling, built-in wall units and cabinets.
Our product is perfectly suited to meet the needs of both the professional and do-it-yourself installers.
Fine adjustments are possible in both directions, helping to reduce the workload and make the job easier for one person.