The Insertrolley is a simple yet ingenious system which can be used with a wide variety of Kata cases. It allows you to either use the trolley separately or with several cases at once. Simply slide the trolley through the integrated sleeve on any of KATA's compatible cases for secure and easy mobility. You can detach the trolley when you want to store it and easily replace it if damaged. KATA's patented extendable wheel system helps to better stabilize larger cases.