3mm diameter Allen Wrench (Dimension:20.3x56mm) for neck locking nut as well as bridge string locks
2.5mm diameter Allen Wrench (Dimension:18.3x54mm) for adjusting saddle intonation screws
The item can be used for many other tremolo bridges as well, but please verify the wrench diameter carefully to confirm these are the correct sizes for your bridge before you order the item