First aid kits are commonly adapted to the nature of the industry (and therefore - the nature of possible traumas), however there usually contain general purpose medication and appliances to treat common wounds like bruises and cuts. Medical kits may vary based on the variety of supplies they contain and their amount. Some kits are one-time use, when other may be used multiple times. Kits are mostly suited for treating light wounds, however they contain appliances like bandages, stanches, and drugs that can be used if a worker has received a serious or even life-threatening trauma, however immediate hospitalization is necessary because first aid kits are not suited for serious injuries.