India*Slip-Round 4" x 3/8" Medium Microscopes Filled with asphaltum or bitumen-based

Filled with asphaltum or bitumen-based black pitch — not natural black pine pitch

Short carbide twist drills (Fig 4205S) for precise starter holes

Grit range from 4/0 (finest) to 3 (coarsest) for progressive stock removal and polishing

Push-button digital calibration for consistent accuracy

Tru-Square Metal Products stock number 202

India*Slip-Round 4" x 3/8" Medium Microscopes Filled with asphaltum or bitumen-basedThe India Slip Round is a tapered round sharpening stone measuring 4" x 3 8", designed for sharpening and honing curved or hard to reach edges on a variety of tools. Its round profile makes it well suited for working inside curved surfaces, gouges, and contoured tool edges that flat stones cannot effectively reach. The medium grit provides a balance between material removal and surface refinement, making it a practical choice for routine edge