GT series cylindrical locksets exceed industry standards, offerings durability, security, and ANSI/BHMA Grade 1 extra heavy duty certification. Grade 1-Cylindrical Lockset, F87 Institution function, GT 128 Series, Philadelphia lever style, 2-3/4" backset, Strike Type Dimensions 1-1/4" x 4-7/8" ASA, recommended door thickness 1-3/4" - 2-1/4". Best compatible keyway small format interchangeable (SFIC) housing less core. Windstorm rated. Made in the U.S.A. 25 year limited warranty.
Institution F87 - GT 128 - Philadelphia