The Leonardo Fish fin tool was designed to be used on fish fins specifically, but can be used in whatever way you can imagine. Cleo Dunsmore uses the tool on her beautiful fish beads. The Leonardo Fish Fin Tool is basically a half of the Leonardo medium fishbone tool. http://www.leonardolampwork.com/featherbone-and-fishbone/leonardo-fishbone-tool-medium/ It has a tweezer length of 7 or 8 inches depending on which length is available at the time of ordering. The head of the tool measures 1/2 by 1 1/2 inches. The prongs are .05mm. FREE beeswax shipped with order.