Metal Ring Mandrel Stick: The ring mandrel measure is made of aluminum with US sizes of 2-15 and European sizes of 41-76 (with half sizes, no quarter sizes)Metal Ring Sizer Guage: The Ring Sizer Set are made of steel,US size(0-13)coming in half sizes, come with a flexible cable with a screw connection so each size ring can be take out and easy to use alone helping you confirm the correct size before purchasing.Jeweler's Rubber Hammer : with Double-Faced Soft mallet head made of high-quality high-carbon steel forging, have high strength The rubber head made of rubber material, soft translucent, proper hardness, suit for tapping gold and silver jewelry, plastic parts, electronic components, woodworking parts and won' hurt the working surface Ring sizer Guage Detachable design, each size ring can be take out and easy to use alone. Help you confirm the correct size before purchasing.Durable and never rust, good value for quickly figuring out the sizes of rings and , great for craft wire, wire working and jewelry no matter you're a beginner or a , Perfect present for your lover, family and friendsPlug Type: US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the United States, the Philippines and so on.Colour: as shownMaterial: rubber + metalPackage Contents:1 x ring sizer mandrel1 x ring sizer guage1 x jewelers rubber hammerOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.