What kind of glove offers the best protection when using an angle grinder?
You want moderately heavy leather (or an abrasion-resistant alternative), and you want a good fit.
Firstly, angle grinders aren't very dangerous. Abrasive wheels can go through leather fairly quickly, but it takes a lot of force. The vast majority of hand contact will be quick and light. You won't even notice it. I've even bumped bare skin against abrasive and diamond wheels with no real injury. If the wheel disintegrates, the guard should take the hit.
Any halfway thick leather is fine. You don't want Isotoners, and you don't want leather so thick you can't bend or feel anything.
Just as importantly, you want a good fit. You want the glove to stay in position for a good grip, and you don't want loose material hanging where it'll get caught in the machine.
Finally, don't wear gloves when using toothed, rotating blades. I recently violated this long-known rule and almost paid dearly for it. My glove slipped a bit and got nicked by a 12&quot; miter saw. Had it grabbed the glove's fabric more aggressively it could've pulled my fingers right in. Foolishness noted.