The Excalibur Ceramic Blade is the long lasting, super smooth cutting, non-conductive blade, made of space age materials. You will love this blade! The mechanical strength of the Excalibur Blade approaches typical tungsten carbide values and are much higher than those of sintered alumina or silicon nitride. The absence of a metal phase greatly improves corrosion wear rate over various grades of tungsten carbide. Excalibur's Norzide Zirconia has excellent resistance to abrasive corrosion and is most suitable for blades especially where complex, dual phase wear conditions exist. 1 Blade per pack.