The Wera 8100 SB VDE 1 Zyklop Ratchet set, insulated, switch lever, 3/8"drive, metric is a VDE 1000V approved version of Wera's Zyklop ratchet and 16 piece VDE socket set.VDE ApprovedErgonomic high speed ratchet14 sockets and 2 extension barsThis is a VDE 1000V approved version of Wera's Zyklops Ratchet and Sockets.The Zyklops Ratchet is an ergonomic 3/8" hand ratchet. It has a fine tooth ratchet mechanism giving it a 4.5 degree return angle. Perfect for working in confined spaces. As with all Wera tools, the grip is ergonomic and easy to hold. As with the non-VDE version is has a reversible ratchet mechanism and push to unlock mechanism. Each tool is tested to IEC 609000 at 10,000V.The sockets and extensions are also VDE 1000V approved. Each socket is tested to IEC 60900 at 10,000V. The insuation used is two-layer for added safety.If you need a VDE socket set, this is well made and easy to use.VDE Sockets1 x 6 x 46 mm1 x 7 x 46 mm1 x 8 x 46 mm1 x 9 x 46 mm1 x 10 x 46 mm1 x 11 x 46 mm