Review on 🔍 Porcelain Extraction Glass Drill Bits by Kelly Noonan

Bought to cut holes on the back of the plastic covers of a motorcycle headlight housing (you need to do this to install LED bulbs there they are fans that need to be ventilated). They worked fine for this, but you have to start at an angle or the hole saw blade will wobble (similar wood hole saws have a bit in the center for fine precision). It takes a little practice to get it right. My first pair wasn't as accurate as my later ones. The only drawback is the useless plastic storage box. A plastic box with compartments would be ideal for organizing them, but you only get a cheap plastic rectangular container to stuff them all. I would buy them again.