Made of chrome alum steel. Exact fit precision machined tips. Ideal for your telecommunication tools. High quality precision telecommunication tools. Professional screwdrivers allow you to open cover of mobile phones easily and without damage to the phone cover. Able to open mobile phone, PDA housings, PSP, NDS, MP3 player, etc Package Includes: Including 1 handle, 30 blades as follow 1. 4 Heads Philips PH00, PH0, PH1, PH2 (Most common heads??PH00 most pointed, the smallest). 2. 7 Heads Straight 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0 (Most common Straight heads). 3. 6 Heads Hex: 1.5, 2.0, 2.5, 3.0, 3.5, 4.0mm (model, bicycle, Engine, Guns). 4. 8 Heads Torex T3 T4, T5, T6, T7, T8, T9, T10, T15, (cell phone, PC, hard drive, printer, Xbox, Xbox 360, shaver).