Not stainless steel. They'll go bad in no time. I've used them to make some of my jewelry and my customers have already started complaining. I myself can't use copper or brass material and my ears have turned black from reacting to what's inside. Do not buy!
30Pcs EuTengHao 9X5.5Mm Silver Pin Keepers Locking Pin Backs Clasp Lock
27 Review
Secure Your Stud Earrings With COOLJOY 14K Gold Ear Locking Backs - Set Of 8 Pieces
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50-Pack Necklace Chains For Jewelry Making With Lobster Clasps - 18 Inches Bulk Cable Chain In 10 Colors For Crafting By SANNIX
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Ultra Tiny Pre-Cut Silver Solder Chips: 0.5Mm X 1Mm X 0.25Mm (Qty=1500) For "Easy" Density
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25,000 Pcs Fuse Beads Kit By INSCRAFT - 26 Colors 5MM Including 127 Patterns & 4 Pegboards + Ironing Paper & Tweezers
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