Metric Insulated Angled Ring Ratchet Wrenches for Working at Height Secure Tools provide a wide selection of metric insulated angled ring ratchet wrenches for working at height. Available in a range of metric measurement sizes, angled ring ratchets feature a fine-toothed ring that lets you fasten and open nuts and bolts easily and without interruption. Comprised of high-grade materials, our angled ring ratchets are tough and designed to deliver decades of hard-wearing use– even in arduous work conditions. Moreover, the inclusion of top-grade insulation in the ring ratchet’s design protects against electric shock up to 10,000 volts. And for additional safety, each metric insulated angled ring ratchet wrench comes fitted with a solid open ring attachment point too, giving you a reliable place to tether the tool to your harness and prevent accidental droppages when working from height.