Snap-on's 10-piece ratcheting open end box wrench set, No. SRXRM710, features an open end design and speed wrenching configuration that delivers more speed and accessibility while also providing comfort and balance. Assists in removing hard to reach fasteners that cannot be accessed using a standard wrench or ratchet and socket. The unique open end speed wrenching configuration of the SRX wrenches provides a quick ratcheting-like action as well as easy access to hard to reach fasteners.