Magnet is from a scraped electric motor and makes a great tool holder when suspended above a work area. See pictures. It is threaded (by seller) to either 1/2" - 20 Fine or 1/2" - 13 NC. Magnetic portion measures approx.. 3" in diameter and 1 7/8" in height. Tools shown and nuts required for mounting are not included. Bearings shown are attached to the shaft and serve no function when used for tool storage. Seller dismantles and recycles used HVAC equipment and sells component parts.