USG Sheetrock 1/2in. 2x2 Drywall Panel are innovative lightweight gypsum wallboard panels for use on walls and ceilings. Their high strength-to-weight ratio and superior sag resistance eliminate the need for traditional 1/2" sag-resistant ceiling panels. USG Sheetrock 1/2in. 2x2 Drywall Panel have long edges tapered on the face side to form a shallow recess to receive joint compound and tape.