Break Away Safety Carrier with Nylon Hook is compatible with 88001 Privacy Cubicle Track (Hospital Track). Hook pulls away with approximately 7 pounds of pressure applied. Hook can be reinserted by snapping the ball head back into the body of the carrier without removing the carrier from the track. No metal parts in this carrier - all nylon. Ideal for high risk areas like jails, prisons or mental institutions or facilities where young children are present. Also compatible with most other cubicle track of similar dimensions. Hook easily rotates on center suspension pin. Dimensions: 2.5" Tall. Axle length: 0.96". Wheel diameter: 0.59". Drop from top of 88001 Track to bottom of hook: 2.5"