It is known that the fabric of the hacksaw on the metal is excellent steel, so any, even a small chip count, the initial workpiece for the different cutting tool. The options presented here do not exhaust the varieties of fixtures that you can obtain from a broken saw blade.
First, you need to make a handle for future cutters. Take, for example, pipe diameter 20 — 25 mm from any non-ferrous metal. It is convenient because one end can easily turn into a tool holder for cutters and the other in the canister for storage, tucked into a suitable tube.
To get a holder, it is enough with a file to whittle down one side before the formation of the longitudinal groove and then flatten the end, laying it in a plate slightly thicker than the saw blade. It remains to drill a hole for the fixing screw with a round nut with a notch. A similar hole is drilled at the end of each fragment files, pre-released on fire (heated to redness and allowed to cool in air).