Door thickness Lever assembilies provide automatic adjustment to door thickness from 1 3/8" (35mm) to 1 3/4" (45mm). Can be furnished for doors Over 1 3/4" (45mm) when so ordered. When ordering for doors over 1 3/4" (45mm), specify exact thickness of the door. Latches Supplied with adjustable latches to fit 2 3/8" (60mm) and 2 3/4" (70mm) backset. Latch for 5" (127mm) backset will be supplied when specified. Standard latchface is 2 1/4"x1" (57x25mm) square cornered. Radius and drive-in available when specified. Packing One set per box with screws and instructions for installation. Blister packing available when specified. Reversible Knobset can be used for both left doors and right doors. No cylinder reversing is necessary.