Alloy Retractable Badge Reel Button clip is a popular finishing touch to keep work card secure. Alloy Retractable Badge Reel, Card Holders, with Plastic and Iron Findings, Size: about 85mm long, 32mm wide, 15mm thick; wire size: 50~52cm.Work card holder is attached by a triangle ring, divided into button side and tablet keeping side.And the tablet keeping side can be connected with long belt.