I finally got off my butt and ordered some magnets for some projects. They are mainly for getting my Tyranid monsterous creatures started since I have had an assault brood box and a hive tyrant sitting in my basement untouched for months and months. Originally I had bought some ~1/4 inch ones from my local craft store but the more I look at them they just seemed to big.
I ordered a whole range of sizes so I can try different things. I got 1/16 inch diameter ones at thicknesses of 1/32, 1/16, and 1/8. Let we tell you those 1/32 are tiny. Not sure if I will be able to use those. They might work for something like a speeder or attack bike since I can probably get away without countersinking them and the weapon is already partially held by the rail.
That is a 1/16 compared to a bolter. This is the diameter for space marine hand swaps. Now this is what the three lengths look like on the side.
I also got some 1/8 diameter which will probably be the mainstay for most pieces I hope. They seem a pretty good since for handling.
I also got some 3/16 for bigger parts like dreadnought arms and MC heads/arms. This size fits perfectly inside the Arm holes of the full plastic dreadnought kit. They are a little big for the Black Reach one.
All in all I got like 400 magnets for about 40 bucks including shipping. They even arrived really quickly (4 business days) without special postage or handling just normal first class from K&J magnets. Project 1 will probably be magnetizing my Dreadnought Arms since I have been using double sided tape when I want to use 2 dreads. Project 2 will then be a new predator with all the options to go with my more classic TL lascannon with HB sponsons.