ADC adult-size hook-and-loop fastener tourniquet is an effective way to achieve controlled vessel constriction. It can be applied easily and instantly for perfect venous or arterial constriction.
This was purchased for an emergency first aid kit, and fortunately I have not had to use it. I did unpackage it and checked out its' function and it seems to work fine.
This tourniquet works great and is a definite for the serious phlebotomist