Push the knob on these latches once to disengage the strike, and open the door. Push again, and the strike is engaged, locking the door.
Knob/rosette combinations are available in polished brass or polished nickel.
Rosette fits a 20mm (25/32") hole, in material up to 5/8" thick. The lock body is 1 7/8" high by 1 3/8" wide, and surface mounts on the inside face of the door, using two screws. Each requires #6 screws (not included).