This is a 1-3/16 in. concave steel ball bearing roller assembly that installs into a 1/2 in. deep x 2-15/16 in. long mortised pocket on each end of the solid wood closet door bottom rail. The roller assembly is held in place by two 3/4 in. long screws. The bracket is stamped steel with a 1-3/16 in. steel grooved ball bearing roller. It rides on a metal track installed onto the floor. Used by a variety of manufacturers of sliding solid wood closet doors.

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