Selby Furniture Drill and Drive Cylinder Magnets feature nylon-housed permanent magnets designed to drive easily into holes in wood, ing maximum pulling power in a compact space. These magnets come with a standard screw-on strike, while a drive-in strike is also available as an option. The pole-pieces are ground and rust-protected to ensure maximum efficiency and extended lifespan. Additionally, these magnets resist solvents and detergents, making them durable and reliable for various applications.