【1 YEAR WARRANTY】: All LLNDEI socket tool set are rigorously tested, ensuring peak performance and durability. Note: The grease on the surface of the sockets is applied to prevent rusting. 【WIDE RANGE OF APPLICATIONS】 LLNDEI ratchet socket wrench set covers a variety of functions, such as spark plug socket set of common specifications, a T-bar that can be used in place of a regular wrench and the hidden value of a screwdriver set to expand your use.