Smooth and easy one hand opening system on this Laguiole knife. The ' Bee 'and spring with its lock-back secure system is made from 3 mm thick stainless steel Z20c13. A solid hardened blade stop is provided to helps maintain the edge of the blade. The traditional bee is solid and forged into the spring. The spring and bee are hand-chased with a file to denotes artisan quality, unlike inexpensive mass market products that have welded springs and are machine decorated. These details create a unique Laguiole knife, making each knife one of a kind.