Simply pull the lock, twist to remove and add weights.
The Weider 40 lb. Powerbell quickly adjusts from 10 to 40 lbs. while incorporating an innovative SpaceSaver® Design. Combining seven kettle bells in one convenient set, it saves space so your fitness area will be clutter-free! The 10 lb. weighted handle of the kettle bell can be used for beginner workouts, or exercises that require less weight. The kettle bell has six 5 lb. weight plates so you can customize your workout to fit your ability and preferred weight.

Dimensions: 8"L x 7"W x 8"H