HEAVY DUTY - ANSI/BHMA Certified A156.4 Grade 1 tested over 2 million cycles "ADJUSTABLE - Fully adjustable power spring Size 1-6 to fit all type of door weight. Adjustable Sweep (Closing), Latching, and Backcheck to suit your needs" ADA & UL/CUL LISTED - Meet ADA 5LBS opening force and UL10C for 3 hours fire rating "HARDWARE - Self Tapping Screws, Machine Screw, Thru Nuts, Full Plastic Cover, Tri-Pack Multi-Mount ( Parallel, Regular, and Top Jamb arm) for arm installation." EASY TO INSTALL - Installation instruction with detailed template included. Comparable to Norton 1600 Series "Nuk3y 9000 Series Grade 1 Heavy Duty Door Closer, Multi-Mount, Adjustable Size 1-6, ADA Complaint, UL Listed"