before I retire , I use one of these in my job for many year . the material for the bag be super-tough Cordura nylon . externally , the many different size pocket neatly store the most used tool for quick access , while internally , the bag have more vary size pocket on both side and on the end , keep all the tool require by electrical or mechanical tech organize and neat for ready access . the size of the bag be just right , IMO , for technician keep mechanical and electrical system in good work order . meter and other misc tool go in the center of the bag , and it be not heavy at all when fill . this bag become standard issue for all the other tech in the plant , it be fit and function perfect for we job . Quality be top notch . so it stand to reason that when I retire , I buy a new one for home use , it be a attachment I can not do without . there be a smaller one , but it be too small for the various tool and meter require by electromechanical technician , and the next size up , while have the same organizational attribute , become too heavy and bulky for people walk to problem in a manufacturing environment . it be the perfect size in we opinion .