Wera HMB Zyklop 3/8in Ratchet Sockets - Wera 05003556001, This 11mm socket from Wera can be used with a Zyklop ratchet with 3/8in square drive to tighten or loosen hexagon-headed screws, nuts and bolts.
Made from chrome vanadium with a brushed chrome-plated finish, this socket is suitable for use with both hand and (non-impact) power tools.
Wera 05003556001 HMB Zyklop Ratchet 3/8in Socket 11mm