Felco Tools Information and Reference Felco Pruners are World Class

Thumb catch for F2, F6, F7, F8, F11, F12, F13, F50, F51, F100 (2-12)

Picture of  2-12
While replacing the thumb catch, make sure you replace the spring washer too. It holds the catch still so it stays locked when locked and stays unlocked when in use. This part may not fit older model pruners.