Use Flush-Mount Floor Brush Kit with removable brush and solid cover for new installations. Install two kits when large bundles of cables are needed. Removable back brush allows floor tile removal without disconnecting cables. There's no need for an oversized cutout because the removable back brush allows large connectors to pass through the grommet. Removable solid safety cover allows installation of the grommet during the construction phase and eliminates the risk of injury by stepping through the grommet opening. OSHA jobsite standards require open holes in floor panels to be covered. NEC, UL and NEMA require safety covers and cable protection against sharp edges.