6 point T50 Torx (star) 75mm long tool. & 12 point M10 75mm long. If you are unsure and can’t see what the middle part you require to undo on your alternator, this set has the x2 most common centre parts.
This product would be best fit for professionals who need to remove alternators from twin engines with 33 tooth splines, T50 thread sizes, and M10 threaded fasteners.