It used to be that people would be told to cut around the bite and then suck the venom out but when sucking that venom out you actually put yourself at higher risk since if you had a small cut or did not spit the venom out quickly you could have put yourself at higher risk. So this small tavel snakebite kit was developed. Notice that there is no room in the kit for a tournequet since they found that people generally didn't use a tournequet properly and it also concentrates any venom not removed into a smaller area which causes more severe loss of limb.