Size: You will get 3 sets of ring blank tray kits, 2mm wide, 17.6mm inner diameter, and 8mm pallets, enough quantities and different colors to meet your jewelry making needs. Adjustable ring base blank: The inner diameter of the square ring watch is about 17.6mm, The blank ring is adjustable to fit most sizes, so you don't have to worry about hoarding multiple sizes. Material: The square ring is made of stainless steel.Strong and durable, not easy to rust or deform, and not easy to break when used.Beautiful, comfortable to wear.The surface is bright and shiny, and it is not easy to fade. Versatile Functions: These adjustable flat rings are ideal for making DIY jewelry crafts, such as cameo pendants, enamel charms, photo jewelry, resin crafts, custom jewelry and so on, try to find more possibilities about their using applications. Elegant Gifts: If you want to prepare small gifts for your family members, lover, colleagues, friends, these square base ring will be a suitable choice, and you can also DIY them into personalized finger metal rings with friends who love DIY crafting, to enjoy handmade fun together.