The AVB-1CK Verti Bolt is a surface-mounted vertical bolt door lock with a brushed satin silver-tone finish and a rounded D-shaped case. A vertical bolt lock secures a door by dropping its bolts down into an interlocking keeper, here a keeper with two loops along the straight edge of the case. A wave-edged thumb-turn knob on the case face works the lock, and four countersunk screw holes fix the case to the door. Part numbers: AVB-1CK Catalogue code: 37301