Valyria 5pcs Silver Tone Stainless Steel Lobster Clasps Jewelry Findings 20mm x 10mm( 6/8"x 3/8") material: stainless steel features: durable and fadeless Thickness:4.5mm( 1/8") Hole size: 4mmx1.7mm( 1/8"x 1/8") Stainless Steel Jewelry Findings