I looked at the sharpener from Harbor Freight & it looked like a cheap collection of plastic parts. But, they had it on sale & I had a coupon so, I figured “What the hell, for $20 I’ll take a shot”. That was 3 years & a couple of hundred sharpenings ago. Now I keep 4 saws of my own going & do chains for 4 or 5 of my neighbors. Got to be the best 20 bucks I ever spent. Out in the woods, I can easily flip a spare sharp chain on the saw in the time it would have taken to hand file the dull chain.