When I first unboxed the Milwaukee M18 Fuel grinder, I was skeptical about the adjustable speed feature. But after using it to cut through metal pipes and grind down welds, that dial became my best friend. The ability to fine-tune RPMs saved so many projects from overheating or messy finishes.

That 'Fuel' branding isn't marketing fluff - this thing chews through 1/2" steel like butter. What shocked me most was how vibration-free it stays even at max power. My hands didn't feel numb after prolonged use like with cheaper grinders.

The auto-stop feature? Game changer. I've accidentally left it running on my workbench three times now (oops), and that instant brake probably saved my shop from disaster. The battery life consistently outlasts my forearms - usually get 45 mins of heavy use per charge.

Only gripe? The guard adjustment requires a tool, which is annoying when switching between cutting and grinding. But for $50 more than the non-adjustable version, this is the smarter buy for anyone doing varied metalwork.