MAXOPRO STAINLESS STEEL RING MANDREL SMALL Expanding ring mandrel hold your rings snug while turning in a lathe. This is a Best-quality ring expander made of steel, which withstands much longer than regular steel. This ring expanding mandrel offer a high level of precision when making rings and is used for stretching all soft precious metal i.e. silver, gold, and copper rings excluding stone set rings. These are designed to be used in a lathe and fit in any drill chuck. ULTIMATE DESIGN There were several design aspects we wanted to incorporate into our expanding ring mandrels. We have achieved the perfect combination of space on each step, the length of the mandrel, and fitting the most ring sizes. Each step has plenty of room to snugly fit even the widest of rings on each step. Making the steps too wide or putting too many on one mandrel would make the mandrel too long. When a mandrel gets too long, it is unlikely to spin ideally. PERFECT FIT Sizes 4-14 fit perfectly on our mandrels, and we even have some overlap between the different sizes to ensure a perfect fit on one of your mandrels. Each step on the mandrel is a half size. (For example, size 4-7 fits 4, 4.5, 5, 5.5, 6, 6.5, and 7). If you need to go larger than 14, adding electric tape to your mandrel will do the trick. SPECIFICATIONS Material: High-Quality Steel Size: Large Ring Size Capacity: 11 to 14 Diameter of the shank - 9/16” or 14 mm