The BEST Door Closers Series door closers from dormakaba protect people from doors swinging open too quickly or slamming shut. The series includes a portfolio of technologically advanced door control solutions designed for a variety of institutional applications. BEST Grade 1 door closers utilize DIN226 and R14 corrosion-resistant aluminum to provide maximum protection against metal fatigue and abrasion. In addition, they: enhance strength and durability; are certified to meet the requirements of ANSI A156.4, Grade 1 quality; comply with barrier-free ADA requirements; can be used with aluminum, wood or hollow metal doors and frames; and come with a 30-year warranty. They offer maximum design flexibility as well and are compatible with 30 assorted specialty function arms, a variety of mounting plates and brackets and a wide range of painted or decorative architectural finishes. The closers are ideal for high-use institutional settings where ADA compliance, safety, sanitation and energy efficiency are top-of-mind.