Middle Atlantic's GK4 4.0" (10.16 cm) Ganging Grommet Kit (4 Pieces) includes four grommet rings to shield electrical wires from abrasion when passing cables through holes in sheet metal racks.
Ganging Grommet Rings cover the chafing lip of standard 4.0" (10.16 cm) diameter knockout holes. They're especially useful when several racks are ganged or installed side-by-side.
Protect Your Cables
Grommet Rings shield cables from unwanted friction when passing wires through holes drilled in sheet metal racks. Gang your racks safely without buying costly electrical fittings, and protect any wires passed through knockouts.