This hand undercutting saw has a heavy-duty wood handle, steel bracket, and replaceable 12" blade. The trapezoidal high carbon steel blade includes a row of 10 point teeth on both sides. The saw includes a front knob for working with both hands to increase cutting power. Good for undercutting wood door jambs by hand. Replacement blade: No. 335. Net weight: 1 lb. Great tool for that green helper!