This graphite lubricant powder is a high-quality dry lubricant that is designed to keep locks working smoothly, when used sparingly.Needle-nosed tube makes the application of the graphite to go directly into your lockCan be use on wood, metal, plastic, or rubber, wherever two surfaces rub togetherMost often used on door locks for houses and businesses alikeDesigned to keep the tumblers on your door locks working smoothly and efficientlyApply sparingly so you do not clog your lock with graphiteThis is a high-quality dry lubricant6. Typically this is used inside door locks to keep the tumblers working efficiently. Graphite Lubricant Powder, 6.