GRK 20161 Top Star Shim Screw With White Cover Caps, 3-1/8" Clamps 12" square has precision-machined working

12" square has precision-machined working surfaces for accuracy

Heavy-duty hook resists breaking

Oil lubricated pump with cast iron cylinder delivers 3

Wide upper spacing to keep big wild animals away and livestock confined

Automatically drains upon water shut off

GRK 20161 Top Star Shim Screw With White Cover Caps, 3-1/8" Clamps 12" square has precision-machined workingGRK Top Star Shim Screw reduces labor for the installation of window and door frames (jambs), insulation, paneling, and built in wall units. Fine adjustments are possible in both directions helping to reduce the workload. Highlights: Color : White Size : 1 4" 3 8" x 3 1 8" Eliminates shimming Ideal for all adjustment applications White zinc plated with star head recess Pack of 100