We love big clasps. Each D ring has 3 holes for your mutistrand creations. Use a jumpring or short length of chain and rings to attach the supplied toggle bar to one of the D rings. D Rings measure 13.3 x 15mm with an inside diameter of 7.5mm and the 3 holes have an inside diameter of 1.5mm. The bar measures 3 x 20mm, it's loop has an inside diameter of 2mm. Finished in a satin rhodium plate.