Joint Genie Professional 5/16" Dowelling tool for precision jointing of furniture, home improvement, carpentry, garden furniture, kitchens. Ideal for all woodworking needs where strong, precise jointing is required simple and easy to use dowel jig. Jointing system makes dowel jointing wood or board together, fast and easy for the expert or amateur Unique mirror image principle guarantees strong, accurate flush fitting joints every time. Joint Genie tools are made from case hardened steel with stainless steel fittings. Included in the box are appropriate drill bits, drill stops, hex keys and instructions. All drilling guide bars come with a life time warranty with normal and proper use.