1. SOFT CLOSING: Barn door hardware stopper without holes, way . Adopt the latest designed soft close, there is no need to drill holes in the track or decide where to install the screws 2. EASY INSTALLATION: Simply hook the cushion to the back of the track and secure with the included hex key. There are 0.4‑1in clearance from rail to door 3. MATERIALS AND SPECIFICATIONS: Black plastic is behind railings, slows down the doors, making them soft stop in their final position. Each soft closing mechanism fits doors of 60-120lbs 4. WITH SPACER: The upgraded actuator provides a more stable grip with a soft close when opening or closing the door. And added 4 extra actuator spacers which will solve the problem of the door being too far from the soft close. Each spacer is 0.15in high, you can install 1 or 2 below both actuators to increase their height and the soft close . PACKAGE CONTENTS: Come with 2 soft closing mechanisms, 4 S hooks, 2 actuators with spacers, 14 screws, 4 nuts, 4 wrenches, complete and convenient Specification: Item Type: Barn Door Soft Close Mechanism Material: ABS, metal Applicable Door Weight: 60-120lbs Package List: 2 x Buffer 2 x Actuator(with 2 spacers) 4 x S hooks 14 x Screw 4 x Nut 4 x Wrench 1 x User Manual