1. 4-in-1 Free Weights: This set includes 6 weight plates of 05 lbs each, allowing a single dumbbell to adjust to four different weights: 2 lbs, 3 lbs, 4 lbs, and 5 lbs Ideal for various training methods and fitness levels|One Second Adjust: Designed with a key detachable system, this adjustable dumbbell set allows for quick weight adjustments in 05 lbs increments, making it easy to customize your workout|Safe & Stable Locking: The locking design ensures that the weight disks remain secure during use, minimizing the risk of falling weights and enhancing safety for all users|Easy to Store: The compact and adjustable design eliminates the need for multiple dumbbell sets and racks, saving space and making it perfect for home or office workouts|Multiple Exercise Parts: Easily change the weight of the dumbbells to target various muscle groups, including arms, shoulders, chest, and back, allowing for versatile training options