Füri Pro knives are made from the finest Japanese and German stainless steel alloys and hardened and tempered for maximum edge retention, ease of sharpening and toughness. Füri blade shapes are legendary: our East/West knives are so efficient that they are rapidly being adopted by Chefs around the World. The cutting edges of most Füri Pro knife models are finished to 'extreme sharpness' at the factory by the patented Füri TECH EDGE Pro Knife Sharpening System. The large Füri knives are balanced with the new 'Coppertail' system (patents pending): a solid copper plug is fused into the end of the handle for easy rebalancing, i.e. as the blade wears and becomes lighter over time, copper is filed from the tails to rebalance the knife.