A hand tool includes a first jaw assembly and a second jaw assembly. The first jaw assembly includes a first handle portion, a first jaw portion, a first pivot portion disposed between first handle portion and the first jaw portion, and a first rail disposed on one of the first pivot portion and the first handle portion. The second jaw assembly includes a second handle portion, a second jaw portion, a second pivot portion disposed between the second handle portion and the second jaw portion, and a second rail disposed on one of the second pivot portion and the second handle portion. The second rail is shorter than the first rail. A lock button is slidingly coupled to the first rail and selectively slidingly coupled to the second rail. A resilient member disposed between the lock button and the first rail to inhibit sliding movement of the lock button.