Sargent 28-10U15-LB-10B Grade 1 Passage Door Knob - US10B Oil Rubbed Dark Bronze Finish, 2-3/4" Backset - Perfect for Hallways, Closets, and Interior Doors

28-10U15-LB-10B Grade 1 Cylindrical Passage/Hall/Closet US10B Oil Rubbed Dark Bronze 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.