A combination is disclosed. In at least one embodiment, the combination includes a suspension bar, a tool holder adapted for attachment to the suspension bar, a hook device for suspending an object and a fastening device which enables the hook device to be releasably attached to the suspension bar. In at least one embodiment, the fastening device includes a first and a second portion for retaining engagement with the web of the suspension bar and its respective flanges. The first portion forms the upper portion of the fastening device, when mounted, to which portion the hook device is fixedly attached either directly or indirectly. The second portion of the fastening device is pivotally attached to the first portion by way of a joint, which, with the tool holder in its mounted state, is oriented parallel with and located between the flanges of the suspension bar.