10PC 3.5KG Mini Neodymium Magnet Base D12mm Thread M3 led Panel Precision Machine Magnetic Mounting Base

1. Diameter 12mm ,small pot magnets 2. Steel shell concentrate the magnetic pull-force to the bottom side meanwhile enlarge the magnetic pullforce by 2-4 times 3. Magnet Holder head external thread Stud M3 (9mm length) 4. the steel shell protect the neodymium magnet against chipping and cracking. 5.Mainly used for all industrial fix ,like Mini equipment , machinary added parts. etc..syi