Pliers. Special guidelines must be followed and tools specifically designed and tested for this application must be used when working under voltage. Weidmüller offers users a complete range of pliers that comply with national and international testing standards. All pliers are tested and manufactured according to DIN EN 60900. The pliers have been ergonomically designed to fit the shape of the hand. This results in better hand positioning, preventing the fingers from being pinched, which ultimately allows for fatigue-free working.