This spring-loaded latch is designed to be welded on, but there is room for mounting holes to be added. The aluminum base is 3 1/4" long X 1 1/2" wide. The L-shaped stainless steel pin with vinyl grip is 6 1/2" long, 3/8" diameter to fit into a 1/2" diameter hole. When retracted, the pin is 1/2" long.