These Magnetic Grease Gun Clips feature a UV-treated composite construction. Each clip contains two 65-pound pull force magnets. They hold nearly any item that measures 2-1/4 to 3-3/4 inches in diameter. Sold in pairs. A pair of these clips securely fastens a grease gun to any magnetic surface. Use them to attach your grease gun to the cab of your vehicle or machinery. The heavy-duty composite material makes these clips durable and rigid. Although designed for grease guns, these magnetic clips have hundreds of uses. Buy a few to help organize your workspace. They also work well at setting up your truck to prevent materials from rolling around. Use them to store your paint cans or adhesives upright. Or use one to keep your favorite beverage handy while you work. Made in the USA! WARNING: Do not use these clips to secure any items overhead. Do not place in a manner which may impede your ability to operate your vehicle safely.