... (cell phone, PC, hard drive, printer, Xbox, Xbox 360, shaver) 8 Heads Hex 0.7, 0.9, 1.3, 1.5, 2 ... .5, 3.0, 4.0 (model, bicycle, Engine, Guns) 7 Heads Straight 1.0, 1.5, 2.0, 2.5, 3 ... , 4.0 (Most common Straight heads) 4 Heads Philips PH000, PH00, PH0, PH1 (Most common cross heads) 2 Heads Philip Z0, PZ1 Weight: 145g ...