Greater durability. Fortum socket wrenches are cast from chrome-vanadium steel.
Greater durability. Fortum socket wrenches are cast from chrome-vanadium steel 61CrV5 and modified on NCS machines hardened in oil and hardened around the perimeter to achieve optimal hardness and strength of the thin-walled structure. 61CrV5 and 61CrV4 (also referred to as 6150 and 6140) is the highest grade of chrome-vanadium steel. Hardened and surface-treated with matt hard chrome to achieve optimum surface hardness and corrosion resistance, this steel is used for all parts except the most exposed ones. The Fortum MultiLock profile, characterized by twelve round internal protrusions, can be used on almost all known types of screws. Compared to conventional heads, it is easier to put on, allows you to grip even heavily damaged nuts and prevents nuts from jamming.