Abstract: A decking board installation tool, providing fixed and or adjust ability of multiple components. Comprising of an on board allen key which is firmly magnetically carried and non intrusively stored underneath the tool, when not needed for making adjustments to the tool. The onboard allen key universally fits and adjusts all fasteners and components on the tool and or tools associated with The Ultimate Deck Jig. The tool also has an ergonomic side edge profile, which allows for picking the tool up easier and gives the user more comfort when used for extended periods of time. Also, because the tool is made of lightweight material, extruded aluminum or injection molded plastic, the user is less likely to feel the effects of its weight when in use over an extended period of time. The tool also has clearly laser etched and or molded incremental markings on the drill bushings and the body of the tool where adjustments can be made, including the various end plate thickness dimensions.