Review on 🛠️ Goldblatt G25638 Vortex Drywall Sander: Achieve Professional Results with Ease by William Stewart

This is normal for surface grinding but the head tends to rotate (tighten center nut to minimize rotation). But it's less than useless for inside corners. The outside edge doesn't effectively grind the corner, while the center grinds the area outside the corner. Buy Black Widow instead. It's rectangular so it works well in inside corners, and each sanding sheet has an attached foam pad so you're always working with a new pad.