1"B Pneumatic Stone Carving Hammer Pneumatic carving hammer with 1" short stroke piston for all types of stone. Generations of stone sculptors have lauded the comfort and control of this tool. Each tool is individually numbered and test run for 8 hours. Guaranteed for life against defects. Requires 6 cfm at 90 psi of air. Made to last since 1890 in Barre, Vermont, USA, from USA-made materials.