you have any questions, please to us : With strong magnets, adheres to any ferrous metal surface, simply place it against any metal machine in your workshop Application: for Ideal for storing small metal parts and tools, such as, nails, screws,, bolts, and more : Constructed from high grade alloy, not easy to break, to rust, long lasting Multipurpose: Can be attached in all positions, horizontally, sideways and upside down, Manufacturer: MINGLEA