Master Magnetics Magnetic ToolMat Series grommets are flexible mats designed for holding tools and small parts in workshops or garages. They are magnetic on both sides and will attract any ferrous metal surface; flat or curved. These grommets wrap around themselves and can also be used on non-metal surfaces like ladders, posts & poles. They have durable synthetic leather construction that resists ripping and a chemical-resistant cover for protection against grease, oil & common shop chemicals. These grommets also have a sen-in handle for easy carrying around the workspace.