Professional Picture Hanging Value Pieces Hanger Kit / 12 Piece Kit / 10lb-100lb Hook Capacity / Hardened Steel Nails, Supply Guru 12 piece kit / museum quality picture hangers. Contains hangers with a variety of weight ratings; 10lb-100lb hook capacity Hardware included; hardened steel nails Nails are re-usable and when removed will leave only small pin holes in wall Ideal for sheetrock, plaster, wood, and drywall surfaces