Wera 05003591001 8796 sb zyklop short flexible lock extension 3 8in drive wera 05003591001 this short zyklop extension from wera is made from brushed chrome plated chrome vanadium and incorporates a flexible lock system for permanent interlocking or rapid change of accessories and a free turning sleeve for swift tightening or loosening of screws and nuts it has a 3 8in square drive socket with ball lock wera 05003591001 8796 sb zyklop short flexible lock extension 3 8in drive