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. 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 ring sizer follows the US standard and measures sizes from 0 to 13, ensuring a for your custom ring and achieving professional results. 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, Weight: 1.36245677916 pounds, Manufacturer: Frewurwer