A device in the form of a narrow band or strap intended to be wrapped and manually tightened typically around a patient's arm to control/stop blood flow during collection of blood from a vein; it may additionally be used in non-life-threatening injuries to control/stop bleeding in a limb (arm or leg). It typically includes an adherent layer (e.g., Velcro) and/or a buckle mechanism for fastening/locking that allows adjustments to the degree of tightness; it is not fastened via a rotating handle mechanism (i.e., not a windlass). This is a single-use device.