Bumper pack includes: 6 x single hooks, 6x double hooks, 18x picture pins, 4 medium hard wall hooks. No.1 for hanging small pictures or mirrors. Hard Wall Hooks for hanging small to medium pictures or mirrors. No. 3 Hooks (Double) for hanging medium pictures or mirrors. For metal hooks, drive pins into wall at a guided angle to achieve a secure fixing. Use Hard Wall hooks on solid or very hard plaster walls.