Sing Strap Phone Grip Don't lose your grip on reality or your phone with this Elastic Sling Strap Phone Grip. Simply slip your fingers under the elastic band for a secure grip for easier texting, surfing, photos, and more. Attaches easily to any electronic device or case. Slim design lays flat for easy movement in and out of a pocket or purse. Strong 3M adhesive will not damage the finish of your device.