Self secures and locks with or without access to back side of surface with just a few turns of the wrist, no fall outs Encases/protects the wires and cables for the full unobstructed product pass through of 1 1/2" diameter No tools used to lock, adjustable cap slider opening Wires and cables easily slide through the pass through, without snags or damage Wires/cables are run through the pass thru only. The cap, with an adjustable slider opening, snaps off before installation and then snaps back on, after installation is done and the wires/cables have been run. One run, not two runs. A major simplification and time saver for each unit installed Works for all surfaces 3/8” to 1” thick, make a 2 3/8" diameter hole, use a hole saw 2 3/8" drill bit or other type power/hand saw Indoor/outdoor use, reusable for relocation. For Product unique Features, Dimensions and Installation Steps, see the images, text and video in the Gallery This self-locking wire and cable management grommet is great for use in walls, ceilings, floors, computer workstation desk tops, entertainment centers and endless other applications. Installation: A unique and better grommet to do the job right. Once surface opening made, no tools used. Grommet wings are retracted and then activated for insertion into surface and securing/locking into position by simply turning the pass through tube. Once wires/cables in position, place finishing cap on tube. Grommet is reusable for future relocations. Length: 1 3/4″, Width of outer surface rim: 2 3/4″, Wire/Cable pass through inner diameter: 1 1/2″, Mounting surface thickness: 3/8″ – 1″, Hole saw bit size: 2 3/8″ or use any sheetrock type hand saw- Patented