Okay I need to destroy a hard drive that I don't want bad guys to get banking information off of. For the life of me, I can't find a tool that will undo the screws on it. But, there is a seal, when penetrated, allows access inside, and I -think- I scraped the disc up pretty good with a screwdriver. For good measure I gave it a bunch of whacks to the top of the case with a hammer. Good enough? I don't feel like spending the time to drill in to it, or to place a shaped charge over it.