RJ, I do not know how many you require for your project, but I make a magnetic bottle opener that i use a 7/8 x 1/2 rare earth magnet in......I use Applied Magnets ....I buy them 25 at a time and save over 4.00 a magnet even paying the freight.....They have all shapes and sizes.....They are real strong , the ones I use have over 65lbs of pull....check out their website...does not cost anything to look.