Ruby Midget Files in a half round profile are precision finishing tools made from pure, sintered crystals of synthetic ruby — manufactured in Germany under the Degussit standard with no bonding material. This construction results in an exceptionally hard file that resists changes in shape, making it ideal for fine, controlled work on the hardest metals. The files hold their form well during use and can be reshaped or adjusted with diamond wheels and burs when needed. Ruby stones are the preferred choice for deburring, blending, dressing, and fine polishing of molds and dies made from hardened tool steel, carbide, and surgical stainless steel. Jewelers and engravers rely on them for sharpening carbide and high speed steel gravers and other precision tools. Features Made from pure, sintered synthetic ruby crystals — no bonding material used Extremely hard and highly resistant to changes in shape Outstanding wear resistance for economical, long-lasting use Half round profile for versatile access to contoured and flat surfaces Can be reshaped and adjusted using diamond wheels and burs Suitable for use in an ultrasonic handpiece for fast deburring and blending Applications Jewelers and Engravers: Polishing and shaping of carbide and high speed steel gravers Sharpening carbide and high speed steel engravers and other tools Mold and Die Work: Use in an ultrasonic handpiece for fast deburring and blending Deburring ejector pin holes General deburring and edge breaking on mold steel and carbide Blending a surface where a straight edge meets a radius Polishing highly detailed areas on dies after dressing the ruby stone to a fine point Polishing ribs and other hard-to-reach areas Specifications Profile Half Round Size 4" x .16" Material Pure sintered synthetic ruby crystals Bonding Material None Origin Germany Notes Degussit Ruby Stones and Files are manufactured from pure sintered synthetic ruby with no bonding agent, which contributes directly to their dimensional stability and extended service life compared to conventional abrasive files. Because no bonding material is present, the cutting surface remains consistent throughout the life of the tool, supporting repeatable precision in grinding and finishing applications.
