A dry wall angle sander for simultaneously sanding both sides of an inside corner without grooving generally comprises a body including a pad of compressible, flexible, and resilient material mounted on a carrier and a handle for gripping by a user. The pad has outward facing dihedral sanding surfaces having an outer dihedral angle of two hundred seventy degrees. The sanding surfaces meet at a juncture defining the longitudinal direction. The length of each sanding surface diminishes proximate the maxim width so that sanding is less aggressive there. Preferably, also, the flexibility of each sanding surface increases proximate its maximum width so that the sanding is less aggressive there.