A rubberized abrasive designed to polish around stones without scratching. The medium grit is the first step. The ideal choice for polishing prong and bezel settings. Composed of pumice in a silicone rubber binder. Wheels measure 22 mm (around 7/8”) in diameter and are 3 mm thick. Available in Square Edge and Knife Edge styles. Maximum speed is 20,000 rpm, but best results are obtained between 7,000–10,000 rpm. Finish with Gray, Fine Pumice Polishing Wheels.  Used with Miniature Mandrels with 1⁄16” screws (see related products below). Made in Germany.