This saw frame and blades set contains everything needed to start cutting sheet metal, large gauge wire and a host of other metal, wood and other products. The set contains 12 each of three sizes of saw blades, a saw frame and instructions. To assemble the saw, unwrap one of the bundles of saw blades and carefully remove one of the blades. Loosen the wing nuts on the saw and insert the blade with the teeth pointing out and down. Slip one end of the blade into the fixture and tighten the wing nut, then apply pressure from the end of the saw so that the blade is guided into the other fixture. The blade should be very tight in the saw. Replacement saw blades are available in packages of 144 blades.