ATX® Magnetic Collar Clamp 50 mm - pairATX Magnetic Collar Clamp 50 mm pair Professional weight plate closures with integrated magnets. Thanks to the magnetism, you never have to look for fasteners scattered on the floor again! The fasteners are simply attached to the rack post or any smooth metal surface after use. They remain safely stored there until the next use. The extra narrow design leaves plenty of space for weight plates on the holder sleeve. The fasteners are suitable for all