Grip-rite, 110 pack, 45" long x 1.5" wide, drywall shims, used to help align bowed or twisted studs, out of plumb corners, misaligned window & door framing, floating butt joints, & framing irregularities, allow for greater inset at the drywall joint, can be attached with screws or nails to framing members of each side of a butt joint.