This Draper 1/4\" square drive VDE socket set is ideal for electricians  The Draper 31037 is a 1/4\" square drive VDE socket set. The set is made from a quality, chrome vanadium steel hardened, tempered and chrome plated. Each component has been tested to 10,000V for safe 1000V AC or 1500V DC live working. Packed in tough plastic storage case. Features: Packed in tough plastic storage case Made from chrome vanadium steel hardened, tempered and chrome plated  Each component has been tested to 10,000V for safe 1000V AC or 1500V DC live working Comes with: 4x Fully insulated extension bars: 50, 75, 100, 150mm 1x Fully insulated reversible ratchet with \"quick release\" button 13x Fully insulated sockets: 4, 4.5, 5, 5.5, 6, 7, 8, 9, 10, 11, 12, 13, 14mm Specification: Pack Qty: 18 piece