Mounts to wood or aluminum and utlizes a standard mounting pattern for 3/8" carriage bolts. Self-contained: never drop or lose a pin againSelf-supporting: easy for dock owners to set-up & take-down their own docksSelf-aligning: functions from above, one 3/4" socket, secures in secondsPatented bushing system means no metal-on-metal squeaking - virtually silentWide range of motion allows for fluctuating water levels and wave action with less noiseEasy to install & align, works with existing corner brackets, backing plates and hardwareSafer for dock builders & owners: carries the heavy loads & no fingers between heavy docks