"i use these regular. working in a factory, i drill a range from polycarb, mild steel, stainless and wood. obviously they dont compare to starretts, but they are a fraction of the price. Allways use cutting ffluid on metals to prevent over heating and extend tool life."
"I use these holesaws on a regular basis with no complaints. They may not be as good as the starrett holesaws, but are a fraction of the cost. Yes the teeth will break from time to time, but I've encountered that problem with the starretts too. It all depends on how you use them!"
"As others have stated. These are cheap for a reason. I used these to cut some holes in metal studwork (soft steel about 0.5mm thick). All the teeth fell off the 20mm bit after about 5 holes and most of the teeth are gone from the 25mm one. Both pilot drills have snapped so I am going to return it as it is not fit for purpose. NOT for the trade but okay for occasional DIYer."