Double Offset Ring Wrenches Sets in Foam For Working at Height Here at Secure Tools, we provide a collection of strong and hard-wearing double offset ring wrenches sets in foam designed for safely working at height. The perfect tool to use across a wealth of trade industries, our imperial double-ended flat ring wrench sets are effective in tightening or loosening nuts and fittings at awkward to reach angles – even in the harshest of working conditions. Our double offset ring wrenches sets include 13 pieces to suit the size of your job, each one housed safely in foam. While each double-ended wrench in the set includes a handy open ring attachment point to let you safely tether it to a belt or harness – ideal for preventing tool drops when working at height.