GRK GRK-17630 - WHITE RT COMPOSITE™ TRIM SCREW #8 X 2-1/2" -100bx protective boot riving knife

riving knife

and "Do-It-Yourself" markets

for instance in 1936 for its malleable cast iron screw clamp

red or yellow

GRK GRK-17630 - WHITE RT COMPOSITE™ TRIM SCREW #8 X 2-1/2" -100bx protective boot riving knifeGRK has modified its innovative FIN Trim Head screw to include reverse threading under the head of the fastener. This technology makes the RT Composite Trim Screw ideal for use in composite and cellular PVC trim Based on extensive tests, GRK has found that the reverse thread helps the screw head disappear beneath the surface of the classic wood composite material, reducing or eliminating the dimple that sometimes appears when using the FIN Trim screw.