Worn out Torx in brake caliper bolts 1993 Beretta GT

Remove all 4 and but a full set at the local parts store.

I recently ran into a similar problem. The original bolts on this year Beretta are torx, but I could not get a torx end to fit. Because the bolts are facing toward the engine, I could not get a good look at the bolt heads. And, in my case, the rotors were very worn, thus, the bolt heads were sunk into the sleeve quite a bit so I could not even feel the head of the bolts with my fingers. The result is, I had no visible clue as to which tool to use to fit the bolt head. I had to guess.

It turns out that the bolts were hex, not torx. (replacement bolts seem to all be hex, not torx). Someone had previously replaced the torx bolts with hex bolts. Once I found the right size hex, everything went well.