Square Corner standard, Round Corner optional

US3, US4, US10B, US26, US26D and BLK

• 50 – Office
• 53 – Entry
• 70 – Classroom
• 80 – Storeroom
• 82 – Institution
• 95 – Classroom

• 1-1/8" x 2-1/4" (29 mm x 57 mm) Faceplate
• All keyed functions except Corridor

2-3/4" (70 mm) Latchbolt - Dead Latch