Half round style. Packaged with an adjustable latch, interchangeable for 2-3/8" or 2-3/4" backsets with square face dead latch. Entry lockset for keyed exterior doors. Key from exterior and turn button form interior will lock or unlock exterior knob or interior knob. Uses Kwikset keyway. Order a case of 24 and receive 4 sets of 6 keyed alike.