Wera HMC Zyklop 1/2in Ratchet Sockets - Wera 05003615001, This 27mm socket from Wera can be used with a Zyklop ratchet with 1/2in 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.
There is a knurled base for precision handling in manual operations.
Wera 05003615001 8790 HMC Zyklop Socket 1/2" Drive 27mm