Prime-Line 1-1/2 in. D X 0.75 in. L Steel Roller Assembly 1 pk

This is a K-tab patio door roller assembly with a 1-1/2 in. concave steel ball bearing roller. The T-shaped tab (K-tab) is simply slid up into a T shaped receptacle in the bottom of the patio door. No screws are required. The housing is 3/4 in. wide with a dimple width of 7/8 in., 1-1/4 in. tall and 2-1/4 in. long. The dimples secure it within the door's bottom frame. Used by Marshall and a variety of other sliding door manufacturers.