The Certa Compact Circular Saw Replacement Blade Set (9 Pack) is perfect for a variety of cutting jobs. You won't have to look for a replacement blade anymore. This set has 3 TCT blades, 3 HSS blades, and 3 Diamond blades. Easily switch similar type blades in case one is not as sharp as you want it. If your working on something that requires different kinds of cuts, you definitely need this pack. Upgrade your Certa Compact Circular Saw Set for clean-cut results every time.