Insulation is moulded directly onto 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. This 6 Piece Set contains the following: 4 x Slotted Screwdrivers: 3.5 x 100mm, 4.0 x 100mm, 5.5 x 125mm & 6.5 x 150mm.