Expanding Stainless Steel Ring Mandrel with Hex Allen Key Heavy Duty Ring Shaper Tool for Ring Turning and Ring Making Ring S BEST VALUESpinning your ring on a lathe will make it 10x easier to make rings compared to using a rotary tool or other methods. You will get a much more professional finish most of the time. If youre making more than one size ring, this steel expanding ring mandrel set is a lifesaver because you can easily swap out any size and have a snug fit within seconds DESCRIPTIONThis Large expanding ring mandrel for lathe fits ring sizes 7.5 to 10.5 This set also includes an Allen wrench to expand and contract the mandrel. It has 7" base to fit a variety of chucks and can be used in a lathe or drill EASE OF USEIts effortless to use this expanding mandrel for lathe. There is extra room on each ring size to accommodate tape to keep the inside of your rings scratch-free. For proper function, apply a layer or two of tape to the step you will be using. This helps protect the inside of your ring Precise & Adjustable GaugeExpanding mandrel offers a high level of precision when making rings. Designed to be used in a lathe. Also fits in 1/2" drill chuck. ULTIMATE DURABILITYOur expanding ring mandrels for ring making are made with wear-resistant steel. While other materials such as wood or carbon steel rust or wear down, these ring expanders will withstand the test of time even with heavy use