304 Stainless Steel 4-Ring Hook Clasp, Silver This clasp consists of two parts: one part is the box with the decoration and three 1 mm holes, and the other part is the hook that fits into the box, also with three 1 mm holes. (see photo)
Measurements: 15x10x3mm Hole diameter: 1.4 mm It is not magnetic; it closes with a snap using a strong spring tab that connects the two parts. Stainless steel for jewelry making of the best quality, 100% hypoallergenic.