Hager Standard Duty Grade 2 Single Cylinder Classroom Door Knob Set from the 3500 Collection

3500 Collection Standard Duty Grade 2 Single Cylinder Classroom Door Knob Set The Hager 3570 Grade 2 classroom knob set provides a perfect combination of value and performance and is the ideal choice of lock for typical commercial applications. It is an economical alternative to Grade 1 when Grade 1 is not required. Hanger's 3500 Series lock offers superior dependability and is backed by a lifetime warranty. Features: Classroom Knob can only be locked with a key from the outside. The inside latch is always free making it panic proof. Inside and outside rose liners contain independent high strength torsion springs that allow the levers to move bi-directionally without lever sag. Includes ASA strike. BHMA Certified ANSI A156.2 Series 4000 Grade 1 ANSI A250.13 Severe Windstorm Resistant Component UL/cUL Listed for all functions up to 3 hours Specifications: 2-1/8" Cross Bore 1" Edge Bore 1-3/8" - 1-3/4" Door Thickness 3" Rose Diameter 2-1/2" Projection 3/4” (18 mm) diameter stainless steel bolt with 1/2” (13 ...