Brocket Magnetic Socket Inserts from Vasichek Enterprises securely hold nuts, bolts, and self-tapping screws into sockets for hard-to-reach areas. The reusable and durable inserts fit all brands of 1/4-inch, 3/8-inch, and 1/2-inch drive sockets, including six-point hex sockets and 12-point sockets, and are available in metric and SAE. The nickel-plated magnets are rustproof and tough enough to be used with an impact wrench, and the inserts are designed so no direct contact goes from the magnet to the socket. The size is imprinted on the back for easy identification.