Prime-Line N 6614 Roller Guide, Steel, White

N 6614 is a spring-loaded 7/8 in Dia nylon roller guide in a steel nail down base. The base is 3/8 in with 2 nail down tabs on either side. It mounts on the top edge of a bi-fold door that is 1 to 1-3/8 in thick and up to 30 lb.