A kit for mounting a wooden fixture comprising a body of wood, such as a handrail or a ceiling panel, on a supporting structure features a pair of brackets each for fastening to one of the wooden fixture and the supporting structure. Each bracket has a threaded surface which is threaded in an opposite rotational direction to the other bracket. That is, one bracket has right hand threading and the other bracket has left hand threading. The kit includes a coupling with a first surface portion which is threaded in the same direction as a first one of the brackets for mating therewith and a second surface portion threaded in the same direction as a second one of the brackets for mating therewith. The coupling is thus arranged for threadable mating with both brackets concurrently in a manner mounting the fixture but leaving a front face thereof uninterrupted.