Bought 5 blades. Three blades broke in just 2 hours of use. All blades broke at the weld. The saw was fully adjusted after the second blade broke, but the 3rd blade didn't last much longer. I installed the 4th blade in hopes of buying more blades from a different brand soon. The blades seem to cut well and track well. Tension is moderate, so I have no indication that the saw or the operator is at fault.