DK Fastening bolts, For component shelves, Slotted, Component Shelves & Rails, Steel, Clear-chromated, 73181535, 4 pc(s), 0.353 lbs, 4028177124981, For non-slip attachment of your components, the bolts are screwed into the longitudinal slots of the component shelf support surface, making them infinitely adjustable and suitable for use with any appliance.