Fool's Tools--AKA Harbor Freight. Very few of Harbor Freight's tools can stand up to moderate-to-severe usage. Most of the electric-motor driven tools (grinders, sanders, saws, lathes, etc.) are for light/limited duty only. They are generally noisy, bearing and races overheat, armatures tend to drag or lock up magnetically and smoke/burn. Plastic gears strip without possible replacement. The philosophy is: "They are cheap enough, so I will just buy another one, if this one burns up or breaks." I understand a young mechanic/carpenter getting started with less expensive tools. I get it!
Every (I mean all) bench grinder stones/rocks, I have tested, are unbalanced and cannot be trued without significant weakening. I am the receiptor of 5 stitches from an exploding HF (brand new) cutting wheel. Having said that, their quality(?) bench grinder is well balanced and runs true--weak but no vibs.
Their cheap(?) MIG welder does a half-way decent job for it's capacity. However, if a diode in the chip board or a an air or gas valve fails; you are out of luck. Liners wears out quickly. MIG wire rust quickly if not used constantly. Getting replacement parts is damn near impossible.
Consumable goods, such as sand paper, tape, grit discs, wire brush wheels are inferior. The cutting ability of their sandpaper (wet or dry) is poor and wear out very quickly. Masking tape is ok for rough lines. Professional automobile painting requires much better tape, for smooth, distinct lines. Wire wheels shed wire much more than domestic-made.
I am not down on Harbor Freight, but I see a tremendous amount of poor-quality stuff coming out of China onto HF shelves. HF is not alone in this "buy cheap" attitude. Lowes, Home Depot, auto parts companies, Walmart are among an endless number going for "cheap." Front wheel hubs, axle bearings, air compressors, elastic straps, etc. just do not have the same quality. People will buy stuff, based on one or two cents difference and never consider quality; although, they will pay more in the long run. As these prices get lower (or remain low), the race is on to stock goods that are even cheaper, which means even lesser quality. More profit!
This demand for cheap goods from China has resulted in a $500,000,000,000.00 (billion) trade deficit with China alone, PER YEAR. Folks, that is half a trillion dollars leaving this country, every year! Our total trade deficit is now about $900,000,000,000.00. We are now paying the price our "cheapness."