Insulation is moulded directly onto the blade. Individually tested at 10,000 V AC and approved for 1,000 V AC. Patented SoftFinish® handle ensures work is kind to hands and muscles. 5 x Hex Nut Drivers: 5.5 x 125mm, 7 x 125mm, 8 x 125mm, 10 x 125mm & 13 x 125mm.