Surface bolts for door, the size can be 6 inch, 8 inch, 10 inch ... 2-3/4"Throw: 1/2 inch for spring latch and 1.0 inch for dead latchFinish: zinc plating or powder sprayingFunction ... : coat hook, kick plate, push plate, flush bolt, door stop, door bumper, doorknocker, security door guard, surface bolt, flush ring pull, adjustable ball ...