The anatomical and ergonomic handle of the sharpener offers safety during use. The sharpener is made of polycarbonate and fiberglass, the handle is directly injected onto the steel bolster and finished with aluminum rivets. The Century Line has a 25-year warranty covering manufacturing faults and is certified by the NSF, National Sanitation Foundation, an organization internationally recognized by its consultancy, inspection, and training practices aimed at guaranteeing the sanitation of food, water, air, and the environment. The sharpener is dishwasher safe.