These custom-sized N42 neodymium rod magnets are magnetized through their 8.47mm (0.33") thickness and have a diameter of 5mm (0.2"). These compact magnets are favourites among craft enthusiasts and model makers but they also have many uses in engineering, manufacturing and technology where small size and maximum strength are required. What's more, because of their resistance to demagnetization they are ideal for creating a shock-absorbing or damping effect when used to repel other magnets.