Abstract: A length marking device is provided that is used to mark measured distances along a work piece using a handheld tool that is struck on its ends to physically mark the work piece before cutting the same. The device comprises an elongated member having a first end, a second end, and a length. The first end comprises a strike plate that is designed to be struck by a hammer tool. Below the strike plate is a blade, which is pressed into the work piece upon being struck by the hammer. Along the second end of the device is a pointer, which extends substantially perpendicularly from the lower side of the elongated member. The pointer can be used to offset a previous mark, or can similarly be used to mark the work piece by striking the top side of the same. The pointer is optionally slidable along the member length.