Two sets of two-point tremolo units, manufacturer unknown, but the shape suggests a Korean-made Wilkinson, so they are likely Korean-made. No accessories included. Selling them off. String spacing (both): 10.5mm Stud spacing (both): Approximately 58mm (28mm on one side) Should be installable on a standard two-point tremolo setup. Both seem to have a decent weight, so the strings shouldn't vibrate excessively. Thank you for your consideration.