Arrow QL17SB03L Polished Brass US3 Grade 1 Classroom Cylindrical Lever Lock, specially designed as a freewheeling lever for abuse resistance, and it's ANSI/BHMA A156.2, Series 4000, Grade 1 certified. This lever is UL/cUL listed for use on 3 hour, "A" labeled single swinging doors, it has FF-H-106C Federal Specifications, it has accessibility code ANSI A117.1, and its ADA approved. This lock features a 2-3/4" backset, a 1-1/2" throw, 1-1/8" x 2-1/4" inch latch front, it fits standard doors 1-3/8" to 1-3/4" inches thick, it has a freewheeling lever, the Strike is 4-7/8" inches, and it is non handed, so the lever can be used on left or right hand applications. For installation the door requires a standard 2-1/8" bore hole through the door. QL Levers are pressure cast zinc measuring 4-3/4" in length. The QL Roses are wrought brass 3-11/32" inch in diameter, and the total projection from the face of the door is 2-17/32" inches out.

Classroom: Latchbolt operated by knob from either side. Outside knob locked or unlocked by key from outside. Inside knob always operates latch.