I've been using a long flat blade screwdriver for years. The blade fits just right in the T15 screws. I think it's an 1/8" one.

RE Craftsman, blech. I love their wrenches, but most everything else is crap these days. Lifetime warranty is worthless if it keeps breaking - oh, and Harbor Freight has lifetime warranty on a lot of their stuff, as does pretty much anywhere else.