Made of high -quality Metal, with high hardness, abrasion resistance and rust resistance. The round cup sleeve includes 6 sizes: 010, 014, 016, 018, 020, 023 The specific 3/32 -inch (2.35 mm) handle is suitable for rotating tools, drills, grinders, suspension grinders, etc. Used for carving silver, jewelry, wood, walnut, olive core, beads, valuable soft metals, etc. Packaging content: 6 pieces of 3/32inch Handing jewelry to make round cups of burrs Colour:Silver Material:Metal Size:1.0, 1.4, 1.6, 1.8, 2.0, 2.3mm Package Contents: 6 x Round Cup Burr Only the above package content, other products are not included. Note: Light reflection 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.