Abstract: Multi-function tool and handle hook adapted for attachment to and convenient hanging of a plurality of tools or releasable receipt and engagement of a bail or wire handle on a bucket or other tool comprising a hook member, a releasable tightening member, and a multi-function attachment member adapted for engaging and firmly holding any of the plurality of tools together with the tightening member. The attachment member and the tightening member comprise a channel with a plurality of parallel channel walls, each wall also comprising an opposing hooked end, adapted alternatively for receiving and releasably holding in the attachment member and tightening member any one of a plurality of differently-configured caulking guns, for example, and releasable receipt and pivotable transverse engagement with a wire handle, for example for a bucket.