High quality cabinet lock for both wood and metal cabinets. Touchpad number entry. Uses an internal watch battery to illuminate the numbers on the touchpad, do the code lookup and release the knob for unlocking. Simple single-code operation can be reprogrammed. Available in vertical and horizontal key numbering. Knob can be ordered to turn left or right after unlocking depending on application. 3/4" diameter cylinder at the rear of the assembly, see diagrams in photos and datasheet. Cylinder length 5/8" typically used for metal cabinets and 1-1/8" used for wood. All mounting hardware including two different sized tailpieces, and battery is included.