Removal and Insertion: The cage nut tool is a simple solution to the tedious method of installing and removing cage nuts on 10" or 19" network cable racks and will be a necessary accessory for all insertion and removal . Adjustable: Dimensions can be adjusted by screws to fit seamlessly with M4, M5 or M6 locknuts. Delivery: You will receive a cage nut tool to install or remove M4, M5, M6 cage nuts on server cabinet racks. Material: Aluminum. FAST AND SIMPLE: Assembly is quick and seamless. Place the jam nut in the jaws of the tool and squeeze the sides of the jam nut to easily insert the jam nut into the hole. Safety first: Don"t worry about cutting your fingers with sharp tools and screwdrivers. This tool prevents damage to the rack and reduces the risk of injury to field engineers trying to insert or remove locknuts.