RA 558 Straight Fissure Crosscut Carbide Bur

The RA 558 is a premium tungsten carbide bur designed for cavity wall formation, enamel cutting, and flat floor preparation. Its straight-sided fissure design for creating parallel cavity walls delivers clean, efficient cutting with minimal vibration and excellent tactile feedback.

Key Features

• Shape: Straight Fissure — straight-sided fissure design for creating parallel cavity walls
• Material: High-quality tungsten carbide for long-lasting sharpness and durability
• Shank: RA (Latch Type) — compatible with slow-speed contra-angle handpieces

Common Applications

• Cavity wall creation with parallel sides
• Enamel cutting and tooth entry
• Flat floor formation in cavity preparations
• Crown removal and sectioning

Why Choose Koyo Dental?

All Koyo Dental burs are manufactured to strict quality standards and shipped from our US warehouse in Irvine, CA. Enjoy factory-direct pricing, same-day shipping, and consistent cutting performance across every bur in the pack.