Degussit Ruby Bench Stone 4" x 1" x 3/8" Loose

Choose from 2 grits: 110.421  Medium 110.422  Fine Made in Germany from pure sintered crystals of synthetic ruby, these Degussit Ruby abrasive bench stones are extremely hard, maintain their shape well and are resistant to wear. Because they are so hard they can sharpen and finish extremely hard metals such as carbide gravers, but also work on non-metal like glass, porcelain and quartz.  They may be used dry or with a honing oil. These loose Ruby Bench Stones are finished on both sides.