Prime-Line Vertical Mounted Bright Brass Door Lock Set 1-3/4 in., this vertical trim locks set has a 2-1/2 in. backset, cast steel, brass plated knobs, keyed alike as a durable option for your home. This surface-mount design is meant for a right-handed inswing door. The casted steel material provides added durability. The polished brass finish brings an elegant touch.