Reciprocating saw blades rough-in lgth 7 inches -3/8 tpi=5 Low blade profile cuts 2-18 inches diameter holes for 1-1/2 inches PVC pipe. 7-3/8 inches length allows blade to cut holes through double top plates. Nail Guard protects against tooth fracture when cutting through holes in nail embedded wood. Fang tip delivers fast plunge cutting through bottom plates and subfloors. 1/2 inches universal shank. ...