On more than one occasion I’ve wanted to open something up, only to find it has some weird fastener put in place to keep me out. I can understand wanting to keep thieves and vandals out, but I’m perfectly capable of fixing a rusted cable connection hiding behind my provider’s special box (and certainly don’t want to pay the cable company $120/hr to do it).
I bought this set of security bits off Amazon about a year ago and it continues to prove useful again and again. It’s worth noting that not all the bits are security bits. A nice surprise that came in the mix: a bit for turning wing nuts.
I highly recommend this set. Even if you never need the security bits, the hex bits make assembling Ikea furniture a snap. Your wrists will thank you.