BENCH WIZARD 3 PC Rathburn Ring Stretcher | Use for Stretching Size 6.5-15 | Includes Mandrel, Slotted Mandrel, Nylon Die Cap | Great for Resizing Wedding Bands & Only for Precious Metals. PRECISE RING RESIZING: Enlarge your rings with precision using our JEWEL TOOL Rathburn Ring Stretcher, designed to adjust ring sizes from 6.5 to 15. Perfect for jewelers and craftsmen, this tool ensures you achieve the perfect fit every time. SLOTTED MANDREL: The slotted/stretcher mandrel features 6 steps with a 0.25" distance, allowing for incremental changes to the ring's size. Its 8 slots ensure universal pressure on the ring, promoting even stretching and preserving your ring's integrity. TAPER MANDREL: This 3-piece set includes a 5" taper mandrel that narrows to 0.5" at the top, providing accurate placement and handling of your rings for effective stretching. NYLON BASE: Each set comes with a sturdy 1.25 diameter x 1.25" height nylon base, providing a non-marring and non-slip surface to absorb impact and keep your work surfaces safe. APPROVED USAGE: Made from heavy-duty steel however it is meant to be used on non slotted rings and only wedding bands with precious metals. DO NOT USE for Titanium, Tungsten, Stainless Steel, Rings With Gems - this can cause ring to break and gems to detach