The Kettlebud eliminates the need to spend hundreds of dollars on incremental sets of kettlebells. Simply remove the quick-release pins, slide on desired Olympic plates, replace the pins to secure the weight, and begin exercising. ***Fits Multiple 50mm Olympic Weight Plates (2.5 – 45 Pound Sizes, Not Included) ***Dual 3/8″ Wire-Lock Steel Pins Hold Weight Securely in Place ***Light, Portable, and Durable Aluminum Will Stand Up to the Toughest Workouts ***Finally a Truly Scalable-Weight Kettlebell *****WARNING: Do not operate device without both pins in place for secure functioning