Fits our : *Series 1 Pocket Door Track and Hardware Kits, our HBP Bypass Track and Hardware Kits, and our HBP Pocket Door Frame Kits Soft Close- 4- Wheel- Slides normally until Soft Close mechanism slowly pulls door into closed position against jamb. Soft Open- 4- Wheel- Keeps door from slamming against stud in back of door in wall. ***For Doors up to 220 pounds Fits 1 3/8" and 1 3/4" Thick Doors In Stock and Ready To Ship