912S-4X = Trigger Clasp with Ring Sterling Silver

Sterling Silver Clasps with Open Ring These sterling silver chain clasps features a closed ring to attach with a jump ring. The clasp opening is spring loaded. You open it by pulling back the tiny "knob" with your fingernail. Close by releasing and letting the inner spring "pop" it close. 4 sizes available: 912S-41 = 4.8 x 9mm (Pkg of 5) 912S-42 = 6 x 10mm (Pkg of 3) 912S-43 = 7 x 13mm (Each) 912S-44 = 9 x 17mm (Each) Remember that trigger clasps have an internal steel spring. That spring can be damaged by the heat of soldering or by being immersed in acidic pickle solution.