I use it for industrial machine repairs so it fits plenty of tools usually two sets of allen keys, screwdrivers, some small German hex keys, a flashlight, pliers, and has space for more but then it becomes too heavy to carry on your belt....the zipper is good especially in difficult spots it saves you from dropping your tools and running. In terms of durability, it is quite tough and will easily last a long time..at this price it is a very honest choice...