Product description: Quantity: 2 pieces Color: Silver Material: stainless steel Dimensions Inner diameter: 17mm/0.67inch; 18mm/0.7inch Outer diameter: 20mm/0.79inch; 21 mm/0.82 inch Width: 7.8mm/0.31" Package includes2 x Jump Ring Opening Tool What You Will Get2 x Jump Ring Splitting Tool jump, 1pc ID 17mm/0.67" & OD 20mm/0.7", 1pc ID 18mm/0.7" & OD 21mm/0.82", both width 8mm/0.31inch; suitable size to meet your different needs in work and life daily Stainless Steel MaterialThe open and close ring tool is made of stainless steel, which is strong and durable, not easy to break and deform, rust and corrosion resistant, lightweight , easy to carry and store, bringing you much convenience 4 Slotseach stainless steel jump ring opener is designed with 4 slots, it is convenient for you to open or close different sizes of round jump rings; you can also wear it on your hand as a decorative ring Jewelry or Ring Restoration Perfect for making or restoring necklaces, bracelets, anklets, pendants, belly button rings, charms and DIY jewelry; you can also match the rings with other decorative accessories to make you stand out from the crowd Relieve StressThis jewelry making tool is easy to use and very useful. It also reduces stress on your hands and wrists because there is no need to hold it. It is an essential tool for any profession