Arrow RK17 Classroom Grade 2 Knob Lock

Arrow RK17 Classroom Knob: Latchbolt operated by knob/lever either side except when key outside locks outside lever. Inside lever always free. Key outside locks/unlocks outside lever only. Features Construction: Cold rolled steel with zinc dichromate finish for corrosion resistance. Requires standard 1-1/8" (53.97mm) bore through door. Backset: 2-3/8" (60.31mm) or 2-3/4" (69.85mm) Door Thickness: Fits 1-3/8" (34.93mm) to 1-3/4" (44.45mm)doors standard. Latch: Brass 1/2" (12.7mm) throw, UL Listed, guarded latchbolt on all locking functions Latch Front:  1" x 2-1/4" (25.40mm x 57.15mm) for 2-3/8" backset(60.32.mm) or 1-1/8" x 2-1/4" for 2-3/4" (69.85mm) backset. Exposed Trim: RK Roses are wrought brass 2-1/2" (63.5mm) diameter. Total projection from face of door is 2-3/4" (69.85mm).  Strike: 4-7/8" ANSI (123.83mm), 2-3/4" (69.85mm) T strike, or 2-1/4" (57.15mm) full lip strike. Cylinder: Conventional - Solid brass 6 pin. Arrow "A" keyway standard. C keyway optional. Interchangeable Core