Add a cable management hook to your server rack or cabinet for strain relief and organization the cmhook1u vertical cable management d ring lets you add a 1u metal cable hook to your server rack or cabinet to provide an organized channel for your cables this taa compliant product adheres to the requirements of the us federal trade agreements act taa allowing government gsa schedule purchases constructed of high quality steel the cable d ring measures 22 x 39in 57 x 10cm and offers