A tool for installing a rotational coupling device on a shaft, a rotational coupling device and installation tool kit, and a method of installing a rotational coupling device are provided. The coupling device includes a hub disposed about an axis of the shaft and spaced from the shaft. A bore in the hub is aligned with a bore in the shaft and receives a fastener extending through the hub bore and into the shaft bore. The tool includes a body defining an aperture having a shape complementary to a shape of the hub and defining at least one flat and an arm extending from the body in a direction perpendicular to, and away from, the axis. At least a portion of the arm is axially spaced from the hub allowing the tool to access deeply recessed hubs and prevent rotation of the device and shaft as the fastener is rotated.