The ring sizer follows the US standard and measures sizes from 0 to 13, ensuring a for your custom ring and achieving professional results. The main material of this tool set is stainless steel, which is not easy to deform, and , ensuring that you can easily create beautiful custom rings. Complete Ring Measuring and Making Kit: Package includes: Ring Sizer x1, Ring Mandrel x1, Polisher x1, Double-Headed Jewelry Hammer x1, Polishing Cloth x1, Loose Ring Adjuster x6, Polishing Rod x2. The included double-headed jewelry hammer adopts a double-head design, one side is soft rubber, which can fine-tune the shape of the ring without deformation, and the other side is hard plastic, which can complete various production tasks more accurately. All tools are neatly stored in a sleek black storage bag, making it perfect for on-the-go crafts or home use. Portable and Organize, Manufacturer: Akfldms