Buying  saw blades is one time where you will have the opportunity to look around and be selective. Go online for the shortest route to the most information. You can see the actual blades, sizes, specs, some include videos of the blades in action, compare and contrast what is available. This way it’s easy to quickly see the differences in cutting teeth, configuration of the teeth, gullets, hook angles, blade plates. Also group the saw blades you find into purposes such as aluminum, steel, or wood. Tenryu blades are great products, as are Oldham saw blades. You’ll be an expert in the field and in a position to make a solid decision.