The most unique feature of this wallet is its inner adjustable elastic band and stainless steel bolt design which is built into the frame and lets you dictate just how many cards your wallet can fit. The tough, but the flexible band keeps everything together and allows you to carry up to 20 cards at its maximum setting.
Inner Frame Options:
Acrylic Glass (included) | 3 mm | extremely light
Aluminum Space Frame | 3 mm | ultra-smooth card slide | 17g
With the included screwdriver you can always adjust the band to your needs.