Choose OLFA's largest rotary blade for more heavy-duty projects. The tungsten tool steel blade cuts up to eight layers of fabric at a time. This blade is super sharp right out of the package and stays that way longer, thanks to its high-quality construction. For Original 60mm Rotary Cutter (RTY-3/G), Deluxe 60mm Rotary Cutter (RTY-3/DX) and Quick-Change 60mm Rotary Cutter (RTY-3/DX).
Tungsten vs. Titanium
Titanium dioxide is applied to both sides and wears away equally in both sides. once it wears away the base metal will wear away as well. It will not stay sharp.