Ergonomically designed handles with hollow rotating cap for ease of use and precise control. Electro Statically Dissipative to protect sensitive electronic components. Blades manufactured from premium quality chrome vanadium/molybdenum steel for strength. Tips accurately machined for the ultimate screw fit. . Contents: Slotted 2.5x75, 3x100, 3.0x150, 4.0x100, 4.0x150; PH0x60, PH1x80mm.