Square POS Holster with Crossbody Shoulder SlingAbout the Square POS Holster with Crossbody Shoulder Sling The Agoz Square POS Holster with Crossbody Shoulder Sling merges military grade drop protection with a sleek, minimalist look, providing stylish everyday armor and security for your mobile POS. Its user friendly drop in design makes installing the Square Terminal handheld device a breeze. The Square Holster features a unique strap design that allows the pouch to be carried either on your waist