Durable drive pin is heat treated for strength and wear resistanceWill push link pin completely through link/side plateMax pin extension to drive out chain links is 18 mmHandle folds away for easy storageFor 420 to 530 chainMade in the USAWill not work on EK 530 MVO/MVX.The maximum pin extension to drive out the chain link is determined by measuring your chains width from outside face plate to outside face plate.