Kwikdox Economy Dock Hinge is typically ordered in pairs to be used for connecting two sections of docks together. The pin is removable with a hitch clip keeping it in place. If possible it is best to line the hinge up so it shares it's bolts with a corner - this ties the high-load hinge point into the strongest part of your dock structure (a metal corner bracket).
The main drawbacks compared to the Kwikdox Heavy-Duty Silent Hinge are:
much tighter gap between dock sections makes it more dangerous for fingers and toes when sections tip together
much tighter gap makes it much harder to maneuver the connecting pin when connecting/disconnecting dock sections
only accommodates small angles and angle movements between adjacent dock sections/ramps
does not accommodate any mounting misalignment between the two mating halves
Holes sized for 3/8" fasteners. Manufactured by Kwikdox in Canada from North American Steel.