One of derio leather’s unique designed personalized leather checkbook cover. Customize your derio leather checkbook wallet. Derio leather checkbook register case can be customized as per your preferences and requirements such as with your name, initials, etc. * Pen is not included material top quality 100% vegetable-tanned leather used in your checkbook holder. The durability of leather stems from the combination of processing techniques and the fact that we start with only the highest quality of leather. The leather is an authentic-looking leather that naturally adopts marks and scuffs over time giving it a classy look and will last for a lifetime.