PUMP HOOKS XT: Fits shorter handle dumbbells 

Compatible WITH Nuobells, Core Home Fitness, Nordic Track Adjustable Dumbbells

Material: Solid steel with rubber dip molding 

Comes with: 2 Pump Hooks XT

Dimensions: 

Outer Width: 4.45"

Inner Width: 3.6"

Hook Width: 39mm/1.53"

Thickness: .2"

Weight: Each Pump Hook weighs under a pound

PATENT PENDING.