Metric combination ratchet wrench - spanner for working at height Here at Secure Tools, we stock a wide range of sturdy metric combination ratchet wrenches suited for working at height. Perfect for use across various industries, such as rigging, plumbing and general DIY enthusiasts, our metric combination ratchet spanners are effective in even the tightest of spots. Available in 10mm – 24mm sizes, you’ll find the right combination ratchet wrench to complete your job. Each combination ratchet spanner is made from high-quality components that will withstand just about any work environment. And the inclusion of a steel attachment point prevents the item from being dropped and causing a potential accident, increasing overall safety when working at height.