Grip, Twist, Lift: Designed for streamlined workout sessions, this pair of adjustable dumbbell weights allows for a quick and smooth weight adjustment with a simple twist of the selectorized anti-slip handle. The clear dials ensure easy readability for hassle-free customization Smaller Increments, Bigger Progress: Experience seamless progression with this 1-second fast-adjust dumbbell set, offering 12 weight options ranging from 3 lb to 40 lb in smaller increments for each dumbbell. This practical design ensures gradual intensity increases, perfect for full-body strength training Double Safety Lock Designs: This pair of adjustable dumbbell weight set incorporates a two-step weight plate locking mechanism, which enhances overall stability, balance, and safety during exercise routines. The weight adjustment feature is activated only when the dumbbell is securely placed on the tray, preventing accidental operation during exercise Compact Size For Easy Storage: Occupying just 16″ L × 8″ W × 8″ H, this adjustable dumbbell set provides a space-saving storage solution versus 24 traditional dumbbell sets. Simply stash them under a bench or place them on a garage shelf after your workout routine Anti-slip Handle For Intensive Workouts: Tailored for comfort and control, these adjustable dumbbell weights boast 1.5" diameter handles with anti-slip convex textures. The blend of hard and soft materials (PPR & ABS) elevates grip strength and ensures comfort during rigorous workouts