Let me start by saying this little gadget does EXACTLY what it promises - turns your angle grinder into a belt sanding beast. I used it to restore some rusty metal pipes in my garage, and wow! The 60-grit belt ate through rust like butter, while the 400-grit left a surprisingly smooth finish.

BUT (and it's a big but) the installation was a nightmare. That circular flange? Yeah, mine arrived so tight I had to completely disassemble it, stretch the metal with pliers, and spend 20 minutes wrestling with the bolt. Not exactly 'plug and play' as I'd hoped.

The real game-changer is the guide pulley system - it keeps belts shockingly stable even at high speeds. I accidentally tested its limits when my hand slipped, and that belt stayed perfectly aligned instead of flying off like I expected.

Pro tip: This works best with barrel-style grinders. Using it sideways with my trigger-style grinder felt like trying to write left-handed - functional but awkward. Still, for $20 and five quality sanding belts included? Worth every frustrating minute of setup.