When choosing a saw blade for a DIY project, it's important to pick the right one for the job. For example, a circular saw blade with a lot of teeth (generally 40 to 80) is best for making smooth cuts in wood, while a blade with fewer teeth (generally around 10 to 24) is better for cutting through metal. When cutting through plastic or concrete, a diamond-tipped blade is the best choice.
You should also consider the size of the blade. A smaller blade is ideal for making detailed cuts, while a larger blade can handle more material at once. Additionally, look for a blade with a specific purpose, such as a ripping blade for cutting along the grain of wood or a crosscutting blade for cutting across the grain. Finally, check the material of the blade and make sure it's compatible with the material you're working with.