A specialized wood splitting tool and handle attachment for a striking hand tool. The splitting tool uses leverage in addition to downward momentum of the cutting head to split wood. The metal handle and metal cutting head are preferably formed from a single piece of steel, in a perpendicular configuration similar to an adz. A splitting wedge blade within the handle exerts transverse shear forces to enhance splitting, and flat top surfaces of the cutting head and the handle near the joint provide a striking surface. A particularly advantageous handle extension attachment is disclosed that may be used with other striking hand tools as well as the wood splitting tool. A woodsman's hatchet that provides an additional blade perpendicular to a splitting wedge blade is also disclosed.