The cables secure the equipment by attaching to rubber Anchor Feet. The 2" diameter Anchor Feet are bonded to the equipment and work surfaces with high strength glue. Tamper proof screws then "lock" the cables to the feet. Only a special tool (Part No. 90026) can take off the screws. No locks or keys are necessary with these kits, but need to purchase at least one tool (Part No.90026). This kit includes a 36" cable, 6" cable and three Anchor Foot assemblies. To secure additional items with a cable and anchor foot assembly order part number 29-906. Sold to Education and other Institutional accounts only.