I have an 18v DeWalt 6-1/2" saw that I bought used in a set, and it seems pretty weak. It would be fine for cutting a clapboard or something, but I never use it since I haven't worked with clapboards since I got it. Maybe with a new blade it would be better or maybe it's just worn out, I don't know. I had a 6-1/2" Skil corded that was OK, that I gave to someone who had no circular saw. I paid $5 for it at an auction years ago and used it occasionally. My new Makita 7-1/4" is great, lots of power and not very heavy. My previous saws were all 1990s and older.