Cabinet top and bottom has a 6mm durable rubber form insert mat attached.External locking system for security.4 pieces, 4'' casters and 150 lbs loading capacity for each caster.Rubber 4'' x 1'' caster, 2-swivel and 2-swivel with brakes.Drawer capacity 45 lbs each.Powder coating to resist scratch and solvent makings.Ball bearing drawer runners.Drawers are 100% extendable.Side mounted handle.Drawers with non slip rubber mat.