Best 9K37R14DS3626 Satin Chrome US26D Grade 1 Classroom 9K Cylindrical Summit Style Lever Small Core IC Core Lockset, specially designed for Small Core Interchangeable Cores, core is sold separately. The Best 9k series locks have been tested to over five million cycles, exceeding ANSI grade 1 requirements by over five times. This lever features a 2-3/4" backset, it fits doors 1-3/4" or 2-1/4" doors, and it requires a 2-1/8" diameter across bore hole.

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