Product information: Small:4Sets of Strips hold up to 1.8kg Medium:4Sets of strips hold up to 5.4kg Large:4Sets of strips hold up to 7.2kg Contents in Box: 24 x Picture Hanging Strips More information about product: Damage-Free Hanging Works on a variety of indoor surfaces,suck as painted Gyprock,finished wood,tile,metal and glass Small:Ideal for frames no bigger than 20cmx25cm in size. Suitable for frames with no back attachments Medium:Ideal for Frames no bigger than 45cmx60cm in size. Suitable for frames with no back attachments Large:Ideal for frames no bigger than 60cmx90cm in size.Suitable for frames with no back attachments Use Picture hanging strips instead of nails and screws