Mark Tapley wrote: I've found the security bit sets that sell for ?10 or so in the UK (and have maybe 30 bits) to be quite adequate (i.e. I've not found that they break themselves nor do they damage the screws I'm trying to undo). They tend to contain a reasonable range of Torx, a few Tri-Wings and others whose name I forget :-) plus the usual flat blade, cross-point and pozidrive. However, for computers and especially game console use you'll probably want screwdrivers (and perhaps even extra long shaft screwdrivers) rather than short, stubby bits. I needed to get into a digital camera recently and the easiest way acquiring the required tri-wing driver was to buy one that was advertised as being suitable to open a Gameboy Advance. I've since found sets of security Torx screwdrivers (T6-T15) with 75mm shafts for reasonable prices; I've not found a set of screwdrivers with as wide a range of styles as the sets of security bits I have although I think all the ones I looked for were available individually. If you are going to be prising open mobile phones (a cause even more lost than my digital camera I suspect!) then you may need to go down to T5 (I can find as small as T3 online, although they are not security Torx and I'm not sure I could see well enough to find such a screw-head!!) Antonio