Miwolife(TM) Canvas Credit Card Pack Business Card Holder Bag Wallet Cardcase,20 Page(color may vary) Measure 70mm*105mm,can hold 20 card totally. Four different design,to match we will ship to you randomluy. The lock just make it more secure of you card and easy to take with. You can fill with it your bussiness card,credit card, membership card,ect. The canves cloth make it easy to find and hard to slide out your pocket.