Sungold Abrasives 74929 Blue Very-Fine Non Woven Surface Conditioning Type R Quick Change Discs 25/Box, 1-1/2"

Long lasting.

Perfect for what we needed them for

Quick and easy way to clean engine parts, it quickly removes old gasket material.

Poor quality , wears out very fast

Tried these and found as good as 3m's.

I KNOW that “3M” (Scotch), “VSM”, Klingspor”, or perhaps other well-known brands will perform.Every time I try an “off brand”, with regard specifically to “Roloc” scuffing discs, I am disappointed. I keep hoping to find a better price in another brand, and consistently find what I already knew…Pay three times the money for ten times the performance. Don’t be cheap, you will waste your money. Buy the good ones, and treat them well, as an investment, and you will be satisfied.With that said, allow me to digress: I purchased a Milwaukee M12, battery-powered 90 degree die grinder to supplement my pneumatic one, when my airlines were otherwise tied up, to use as a secondary one.It QUICKLY became my primary one. I have used it as my primary die grinder for aroun two years, now! It should be used with 2.0 or 3.0 amp/hour batteries (not the standard 1.5 a/h ones) because it consumes the smaller-capacity ones quickly.If you are using these 2” discs, I absolutely recommend trying this die grinder. It has a slightly less continuous service capacity than pneumatic (if it were a welder, a 90% duty-cycle), but is vastly more versatile, and easy to articulate because of the absence of the airline! If you want to push the 90% “duty-cycle”, I’ve found that using two 3 a/h batteries will overheat, requiring a brief rest. Using a rotation of three 2 a/h batteries causes the exhaustion of the battery before overheating. The fancy, higher-capacity batteries and this tool, by Milwaukee AND the name-brand pads you know and trust will make for a pleasurable grinding experience.

These are well made and better than the super cheap knockoffs. However even the fine grade is pretty rough and seem to be geared more towards removal of heavy paint and corrosion than more delicate tasks such as gasket removal from steel or aluminum engine components. I'm sure I'll use them up eventually for something or another. However I think I'll stick with 3M for most of my needs.

Should've gone with the finer grit, but I made it work.I got these to resurface the engine block mating surfaces for the new water pump. A bit gritty so I just lightly feathered the trigger, worked great & there's no leaks!