OOK 59251 18 Piece Assorted Concrete and Hard Wall Picture Hanging Kit
Assorted Concrete and Brick Picture Hangers kit contains 24 pieces. It includes the 30 lb, 50 lb, and 100 lb Concrete and Brick Picture Hangers and Bendless Nails.  Won't damage your walls. OOK Concrete and Brick Picture Hanger is the only hardware hanger that is specially designed to hang artwork on concrete and brick walls. Bendless nails will not bend.