Perks differ between survivors and killers; a survivor perk may not be used by killers, and vice-versa. Survivor perks can range from giving a burst of speed when running from the killer, to being able to self-heal without a first aid kit, to unlocking the ability to sabotage meat hooks without a toolbox. Killer perks may range from seeing survivors' auras, hindering their struggle time while being carried, and locking down generators to prevent them from being worked on.