The Norton 1688689 Overhead Holder or Narrow Top Jamb Drop Plate features an aluminum finish and is engineered for commercial door controls. Designed by Norton Door Controls, this product ensures exceptional performance and durability with its rack and pinion mechanism and adjustable backcheck. Certified to ANSI/BHMA A156.4 Grade 1 standards, it offers non-handed installation, corrosion resistance, and a molded plastic cover. Backed by a limited 15-year warranty, it reliably exceeds 25 million cycles in internal testing, making it suitable for demanding commercial applications.