I recently put a new internal hard drive in my macbook, but i need the bolts that help stable it. do you know what these screws/bolts are called and where i can purchase them? also, i tried using a t6 screwdriver to remove the same things off the hard drive that was originally in my computer, but they wouldn't budge. it was as if they were already stripped before i tried taking them off. is there a "safe" way to remove these with something else, because it doesn't fit in the enclosure i bought with those dumb bolts on it.