The screw-in-screw design of these adjustable shim screws let you install wooden doors, windows, insulation, paneling, built-in wall units and cabinets without the need for shims. The steel screws are white zinc-plated for corrosion resistance and lasting durability. They have a recessed Top Star™ drive that ensures six points of contact to eliminate the potential for stripping and allow for micro-adjustments and plumb alignment. With their four-point threaded sleeve, the screws provide a secure hold in wooden frames.
- For plumb installation of doors and windows
- Eliminates the need for shimming
- A screw within a screw
- Reduces labour time
- Great for fine adjustments
- To be used with GRK Crown/Bit