The replacement washer works as a retainer for the weighted plates that fit on the dumbbell handle. 

This washer fits dumbbell handles made to fit weight plates with a 1" inside diameter.

The washer keeps the plates from sliding off the end of the handle.  Bolt sold separately.

• Washer Measurement:
  • Outside Diameter - 1 1/2"
  • Inside Diameter - 5/8"
  • Thickness - 3/8"