Metric Combination Wrench Sets in Foam for Working at Height Secure Tools have a large collection of metric combination wrench sets in foam designed for working at height safely. Their tough, chrome-plated design is corrosion-resistant and very easy to clean, giving you exceptional durability that can stand up to a lifetime of arduous working conditions. Available in 18-piece and 8-piece sets, the combination wrenches fit snugly inside foam padding for safekeeping when not in use. While each wrench features the inclusion of a robust metal open ring attachment point. This lets you tether each combination wrench to a harness or belt and prevent accidental tool droppages when working from height.