All 100 arrived. I wiped them to avoid risking it. So far without a trace. One alone can lift nearly 7 ounces, and three together can lift 19 ounces. I would say it's very good for its size. Used for custom fridge magnets. A magnet holds 8 pages on the fridge. Also, don't waste your money on Y35 magnets. When sticking on the refrigerator door, there is no difference. So save your money and buy them. Update: September 17, 2017. Checked on my whiteboard at work. One holds 13 pages, the more iron on the surface, the stronger the magnet. Update 10/11/2017 Still ok. After receiving the Y35 magnets I can appreciate the quality of these C5 magnets. I can tell them apart on my whiteboard. The C5 has smooth edges while the Y35 has rough and jagged edges.
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