Variable tooth spacing for cutting in various materials. Flexible and shatter-proof, for cuts in metals, wood with nails and synthetics Standard cut Bi-Metal OAL = 230mm / 9" 10 - 14 TPI Cuts 3 - 190mm / 1/8 - 7 5/8" metal embedded wood or 3 - 12mm / 1/8 - 1/2" metal