The 4 bands can be used to tie wounds. The metal hooks prevent the elastic band from coming off and firmly support your wound or muscle injury. It is time to throw away your old bandages that have long since lost their elasticity. We have included many extra strong metal clips in this combination medical first aid bandage to keep your bandage in place. Scope of delivery:Elastic bandage*4 Warm tip: Dear buyer, due to lighting effect, monitor’s brightness, manual measurement etc, there may be some slight differences in the color and size between the photo and the actual product. Sincerely hope you can understand! Thank you!