Direct Drop-in vintage style LOCKING machine heads with press in bushings. A locking version of what Fender uses on their American Vintage Series guitars. These are vintage spec with Gotoh's Magnum Lock system to eliminate string wraps and improve tuning stability for those who dive bomb and or bend their strings heavily. Extremely high quality and precision made for those who demand nothing but the best for their guitars without breaking the bank. You simply can't beat Gotoh quality for the money.