Add mobility to your Ready-To-Assemble Modular GearBox with this Caster Kit. Swiveling rear casters make it easy to move your cabinet wherever you need it, while front casters lock with a simple step to hold the unit securely in place. While other manufacturers make claims about weight capacity, strength or durability, Gladiator brand proves it with some of the industry's most rigorous testing regiments to ensure unsurpassed performance in any environment.