HBP Heavy Duty 4 Wheel Ball Bearing Soft Close and Soft Open for Pocket Doors *Up to 140 Pounds Per Door Fits our 2450 Series and 2650 Serise Pocket Door Frame Kit -- **Fits our Series 1 Pocket Door Track and Hardware-- **Compatible with Stanley Hardware 1 3/4 inch Track only Soft Close- 4- Wheel Ball Bearing- Slides normally until Soft Close mechanism slowly pulls door into closed position against jamb. Soft Open- 4- Wheel Ball Bearing- Keeps door from slamming against stud in back of door in wall.