Add or remove your different calls as you need them by simply attaching new loops to the lanyard. DIY Lanyards are braided with heavy-duty nylon paracord for a lifetime of hunting. Each lanyard comes standard with two paracord sliding loops braided into it. This "do-it-yourself" kit includes two single loop attachments, one double loop attachment, and one whistle attachment. Each attachment comes with stainless steel snap hook connectors, so you can attach them exactly where you want them and only when you need them.