Telescopic pull-on vegetable tanned neckline / lanyard

This product is a vegetable tanned leather neck strap with a retractable pull buckle, which can be used with the ID card holders sold in this museum. The question mark hook can be used below, and it can also be directly applied to other card holders / card holders for more availability. https://upload.cc/i1/2019/09/20/MpHU1W.jpg