Schlage L9050LB L Series Mortise Lock Body Entrance Office Grade 1 Screwdrivers & Sockets you can get the best you can get the best image quality and a great deal of detail in low light conditions and full color Easily bolts to tabs (or screw holes) on frame Lock Function ANSI F04 Entry Office lock Latchbolt retracted by knob lever from either side unless outside is made inoperative by key outside or by turning inside thumb turn 3 4" (19 mm) throw stainless steel latch with anti friction tongue Material Stainless Steel Zinc Case size 4 7 16" x 3 5 8" x 1" (113 mm x 92 mm x 25 mm) Spacing Knob or lever to cylinder: 3 7 8" (98 mm)