This is an economical steel-toothed blade for use on the discontinued Crain Model Nos. 800 and 810 Super Saws. It has 100 steel teeth. The arbor hole is precision countersunk for flush mounting the blade screw, and the body has two drive holes to accept the two nubs on the blade driver for these model saws. For cutting wood or dry wall only. Do not use on any metal, ceramic tile, concrete or stone.