High Quality German Bak-Pak Carbide Knife. Precision ground carbide provides 10+ times the life of conventional steel knives. Carbide insert can be sharpened multiple times and can be used on deeper profiles than carbide inlay. Full length bar is available for order or knives can be cut to any specified length. 60° corrugations fit conventional corrugated heads. To inquire about custom profiles please contact: custom@royceayr.com