1/2 ounce (15 grams) pepper spray with quick release and locking actuator. This Self Defense Keychain is effective up to 8 feet with 5 one second bursts. Stop an attacker with instant pain! The 1/2 oz keychain has pure OC* pepper spray, and like all of our defense sprays, is rated at 2 million scoville heat units. Mucous membranes and veins in the eyes swell, making breathing difficult. Carry a self defense keychain for your own piece of mind.