Expanding Ring Mandrel-Ring Mandrel for Lathe,Ring Stretcher,Ring Sizes(7.5-10.5) Turning and Manufacturing Rings Making

My SIL had no problem in making my ring bigger. Now I’ve gone from being scrunched to being perfectly comfortable with my new ring! It only too about 3 minutes!

Appears to be crime plated steel of some sort, not tool steel. Slight wobble when mounted in my metal lathe. Did what I needed but I wouldn't buy if you were using it more then occasionally.

Can’t figure out how to use it.. needs instructions.

Just used this to size a 8 ring to a size 9 1/2 love it.

I would like it more if the width of the one end was adjustable to fit in my lathe.

This mandrel worked perfectly for matching men/womans ring.

When I saw this jig I thought what a great tool to have for certain turning and finishing operations on my machine lathe. It is nicely made and well finished as one would expect for a machine tool. It does work well for holding narrow ring shaped pieces for hand finishing or light machining and is a great alternative to chucking a part and having to turn it. It also get the piece away from the chuck making for good access to both outside edges. Down side is it's really only good for narrow parts that aren't much wider than each of the steps on the mandrel. If you work a piece any wider than that its hard to keep the part from walking and wobbling even with the lightest of cuts. I understand this is just a limitation of the tool and just want folks to be aware when determining if it will do what they need.

Easy to use on sizes 6-16

As a multifaceted artisan deeply entrenched in the realms of jewelry making, 3D design, and crafting, precision is paramount in every aspect of my work. Recently, I had the pleasure of incorporating Expansion Ring Mandrels with Hexagonal Allen Keys into my toolkit, and I'm thoroughly impressed by their performance and versatility.**Precision Crafting:**The Expansion Ring Mandrels offer a level of precision that is indispensable in my craft. With a range of ring sizes from 7.5 to 10.5, I can effortlessly create rings of various dimensions with utmost accuracy. Whether I'm turning or manufacturing intricate designs, these mandrels ensure consistent and precise results every time, elevating the quality of my creations.**Versatile Applications:**One of the standout features of these mandrels is their versatility. From wax carving to lost wax casting, sand casting, smelting, and forging, they seamlessly adapt to a myriad of crafting techniques. Whether I'm shaping molten metal or sculpting intricate details, these mandrels provide the stability and control needed to execute my vision with finesse.**User-Friendly Design:**The inclusion of Hexagonal Allen Keys adds a layer of convenience to the crafting process. With these keys, I can easily adjust the mandrels to accommodate different ring sizes, ensuring a seamless workflow without the need for cumbersome tools. This user-friendly design enhances efficiency and allows me to focus on the creative aspect of my work.**Durability and Reliability:**Crafted from high-quality materials, the Expansion Ring Mandrels are built to withstand the rigors of continuous use. Their robust construction instills confidence, knowing that they can withstand the demands of my craft without compromising on performance. Whether I'm crafting delicate pieces or robust designs, these mandrels offer unrivaled durability and reliability.**In conclusion, the Expansion Ring Mandrels with Hexagonal Allen Keys have become an indispensable tool in my crafting journey. Their precision, versatility, user-friendly design, durability, and reliability make them a standout choice for artisans across various disciplines. Whether you're a seasoned professional or an aspiring creator, these mandrels are sure to enhance your craft and inspire new heights of creativity."**

The product is not concentric at all.I thought I'd be OK with some runout, and haven't measured it exactly, but it's way too much to turn with.For holding rings while working on them, it's good enough. Be careful when expanding the jaws if working on wood or other non-metallic materials, if you tighten the screwn too much, you'll shatter your rings.