Imperial Combination Wrench Sets in Foam for Working at Height Secure Tools have a large selection of imperial combination wrench sets in foam designed for working at height safely. Their strong, chrome-plated design is resistant to corrosion and extremely easy to clean. And the exceptional durability of each wrench means they can stand up to a lifetime of arduous working conditions. Available in 18-piece and 8-piece sets, the combination wrenches slip neatly inside secure foam padding for safe storage when not in use. Furthermore, each wrench includes a robust metal open ring attachment point. This gives you the option to tether each combination wrench to a harness or belt and prevent accidental tool droppages when working from height.