Many wide rings won’t fit a normal ring clamp. Now you can hold these rings securely and easily using the GRS Inside Ring Holder for the BenchMate. Stack two collets together for super wide rings. This special system uses expanding nylon collets that hold rings from the inside.The ring is completely supported for stone setting or engraving without pitch or shellac mess. By stacking two collets together, you can hold even super wide rings! This system totally eliminates the frustration for holding such unusual rings. You simply clamp the ring, do the work and then unclamp it. Each Inside Ring Holder comes with one set of 7 collets covering a full range of ring sizes. If you want to double stack the collets for super wide rings, you must order an extra collet set. (Part number 104.616)