You might want to look at these if your going to coat them anyway. I bought 25 of the 1/2 ones but they are still sitting waiting for me to complete the 100 other projjects. !/2 inch rare earth are very strong.
http://www.leevalley.com/wood/page.a...=1,42363,42348
You can google "lee valley rare earth" to get this link in case it wont work.
Scott