The listing, Rathburn Ring Stretcher for Streching Size 8 Rings or Bigger - Free Shipping has ended.
Because of the enthusiastic response to the mandrel stick ring gauge I'm putting this up for auction with the free drop shipping from Amazon place again. This is a Rathburn ring stretcher for stretching soft rings like silver and I suppose gold but note only size 8 rings or larger, please keep that in mind.
The ring goes over the part with the tongs then you place the "piston" in the mandrel part and tap on it with a rubber mallet. The piston slowly separates the the tongs, widening the ring.
I'm not a jeweler yet, so my word is not "golden" but I read that you should only stretch rings 1/2 to 1 size yourself. For stretching more than a half a size, it was recommended that you bring it to a jeweler. Jewelers have these stretchers and more expensive ones however they also cut and as seamlessly as possible resolder rings. Anybody who would like to add more knowledge here, please comment :-).
Here is the description of from Amazon form this page: http://tinyurl.com/2ek6fxt . Also note that the item only gets 3 stars because one of the buyers didn't read that it only works for size 8 rings and larger and was miffed that she couldn't stretch a size 5.5 ring. She gave it one star. Otherwise it is a 4 star item. Also to gauge your bidding, it costs $18.44.
Anyway here is the description:
"Rathburn Ring Stretcher For Resizing Rings. This is a new Rathburn ring stretcher. It can quickly enlarge plain bands. Simply tapping the end spreads the outer mandrel and stretches the ring. This is used for wedding bands size 8 and larger. FindingKing [selling through Amazon] works hard to update our descriptions and pictures of our merchandise. As part of a process of ongoing innovation by our suppliers, newer versions of the item shown may be shipped before we are able to complete an update. As a result there may be a slight variation in color and design."