Combo pack ASMYNA Dark Blue/Black Symbiosis Stand Protector Cover for NOKIA 521 (Lumia 521) And MYBAT Rubberized Black/Black TUFF Hybrid Phone Protector Cover for NOKIA 521 (Lumia 521) Hardened front-and-back interior shell provides solid support for the rubber exterior. Specialized skin fuses to interior case providing complete protection. Converts into a stand for vertical and horizontal viewing.