Review on Enhance Your Style with 38 Metal Collar Stays Divided: Ultimate Accessory for a Polished Look by Huntsville Rawson

I have never used metal tips so I have no basis for comparison but they appear to be well made with no sharp edges. They aren't attracted to magnets, but I wasn't expecting that. They fall out in the wash, probably due to their weight, so I think you should take them off before washing. (This isn't a downside, just a bit of a surprise. Plastic inserts stay in the shirt with the wash but get damaged. They don't get damaged or rusted.) Seems to be a good range of sizes as I've used all three sizes. I am happy with the purchase.