Emboss decorative designs on the edges of ring and bracelets. Embossing wheels are 6 mm in diameter mounted on square tool shanks that fit on a millgrain machine or lathe. Wheels are hardened and tempered to ensure long tool life. Select from a variety of patterns to suit individual creations. FOR BEST RESULTS & GOOD TOOL LIFE: Apply patterns at 80-100 rpm & apply a drop of light weight oil or kerosene to the work-piece & tool axle.