Ilco 530-53-51 Jimmyproof Deadbolt lock. Surface mount lock has key on the outside and thumb turn on the inside. Drop down deadbolt positively locks to surface mount strike. Lock cylinder is 5 pin Kwikset KW1 keyway. Lock body measures 2 3/4" high and 4 1/4" long. Lock includes surface mount strike, outside cylinder, mounting screws, instructions and 2 brass keys.