Description Sold One Each. Approximately 39x10x3mm white plated base metal hinged slide bail for jewelry making. 26mm inner diameter, and are easy to open and close. Fits up to 3.2-3.6mm chain or cording. For use with 40mm round glass donut up to 6mm thick. Once the interlocking loops are strung onto chain or cording, the bail is securely locked.