One Can of PRO 21 Spray Grease Lubricant, 9 Ounce Can, Synthetic Spray Lubricant, US made. Concentrated, Does Not Contain Solvents. Permanently Eliminates Squeaks And Rattles. Prevents Rust And Corrosion. PRO 21 stays where you spray it and lasts longer than runny, drippy, aerosol lubes. PRO21 is formulated with a superior base stock and advanced additives which will lubricate and protect machinery, parts, and surfaces against friction, oxidation, corrosion, and other types of distress. PRO21 was originally developed for the industrial market, but many people have found it to be of great use around the home...sliding doors, garage door chains, hinges, garden tools, fishing reels, lawnmowers, toolbox drawers are just a sample of its many uses. WARNING Installing or repairing a garage door can be dangerous task. Garage door springs and cables are under extreme tension and require appropriate safety precautions. Working with garage doors and openers could result in personal injury or death. We recommend all installations, repairs, adjustments, and removals on garage doors be made by a qualified garage door technician. Any attempts to install, repair, replace, adjust garage doors or openers are done at your risk. User assumes all responsibility/risk for use of information and products purchased. By purchasing our products you agree to these terms.