Smaller version of the No. 441 lock. Incorporates the same safety features as the Polar No. 441. Permits exit from inside even when latch is locked. Body manufactured from cast iron, all other parts ductile iron. Holes drilled and countersunk for 1/4" screws. Specify offset required. For emergency exit, turn knob to right. For normal exit, simply push exit bar. Finish - Powder coated. Weight - 10 lbs.