Tri-lobe handles for comfort and effective delivery of torque. 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. Set contains slotted 3x75, 3x100, 5x135, PZ0x60, PZ1x80, PZ2x100.