Stainless Steel Ball Chain Connectors Clasp -Hypoallergenic (3mm x 8.5mm) 2mm (50pc) 304 Stainless Steel Hypo allergenic, Lead free, Nickel safe Superior quality connector clasp pack Ideal for keychains,dogtags,medical, jewelry making, crafts and more Clasps size - 9 x 3.5mm (Fits approx 1.75- 2.5mm)