Feature: 1. Soft Close Design: This door buffer damper is one way operation with the latest design soft close, make the door soft stop at the final position 2. Stable Grip Performance: This barn door soft close mechanism provides a more stable grip with a soft close when opening or closing the door 3. Simple Installation: No need to drill holes in the rails or decide where to install the screws, the buffer damper is easy to be installed by fastening the cushion with hook and wrench, the clearance from rail to door is 0.4‑1in 4. Excellent ABS and Metal Material: This door buffer damper kit is made of high quality ABS and metal for long lasting durability 5. Application: This spring buffer damper slowing down the door, suitable for barn doors of 120‑240lbs, suitable for home use, warehouse, etc. How to Use: Assemble to use according to the manual. Specification: Item Type: Barn Door Soft Close Mechanism Material: ABS and Metal Applicable Door Weight: Approx.120-240lb Spacer Height: Approx.0.15in Package List: 2 x Buffer 2 x Adjustment Stop 4 x Stop Spacer 1 x Punch Ruler 14 x Screw 4 x Nut 4 x Wrench 1 x Manual