1 is a chassis hole cutter for cutting holes in metal for wire routing, etc.
2 looks like a crude socket wrench with knurling on one end for better grip.
3 is the handle and securing nut, washer for the fin comb.
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It’s a fin comb. Used to straighten fins on condenser and evaporated coils. The numbers indicate the number of fins per inch of each extension to be used on coils with the same number per inch.
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