28-10G04-LB-3 Grade 1 Cylindrical Storeroom US3 Bright Polished Brass from Sargent Manufacturing - Strength, Durability and Security! Cycle Test: Exceeds 5 times A156.2 Grade 1 requirements . Abusive Locked Lever Torque- without entry gained. Exceeds 1.5 times A156.2 Grade 1 requirements. 7 YEAR LIMITED WARRANTY – no service required to maintain warranty. User friendly packaging, and installation instructions. Quickly adapts to fit multiple through-bolt positions for quick installation. Designed to conform to national & state fire and handicapped requirements. Heavy duty commercial and institutional interior and exterior doors.