BYZOOM FITNESS Classic Series 50/55LB Adjustable Dumbbell Pair Set of 2 OR Single Unit (Check qty before purchase), 5-in-1 OR 15-in-1 Patented Secure System, Solid Cast Iron Core, Iconic 12-Sided Polygonal Anti-Roll Base, Professional Heavy Weight for Men and Women, Black

DOMINATE YOUR HYPERTROPHY. NO COMPROMISE. The BYZOOM FITNESS Classic Series 55LB is engineered for the man who understands that small gains lead to massive results. By integrating two removable 2.5LB micro-plates into our industrial-grade cast iron frame, we’ve created a 15-in-1 tool that offers more precision than any other adjustable in its class. ENGINEERED FOR CHAMPIONS Tested and trusted by WNBF 3x World Champion Zack, this gear is built for the grind. While other brands use bulky composite fillers, we utilize nylon-coated cast iron for a shorter, tougher, and better-balanced dumbbell that survives years of heavy drops. PRECISION AT SPEED The 1-second weight change system allows you to jump between main weight levels instantly, while the micro-loading dials let you fine-tune your resistance. It is the ultimate space-saver, replacing a 15-piece commercial rack with one mission-focused unit. TECHNICAL SPECIFICATIONS: Material: High-Density Nylon-Shielded Cast Iron Weight Range: 10 LB to 55 LB (15 Levels) Form Factor: 12-Sided Polygonal Anti-Roll Base Micro-Adjust: Dual 2.5 LB Removable Plates Safety: Patented US/EU/Asia Dovetail System

• DURABLE CAST IRON CORE: BYZOOM FITNESS Classic Series uses a high-density, nylon-coated cast iron core for a compact, professional feel that handles years of high-intensity training. Buy one set, use longer. Best Value Dumbbell Set for Home and Garage Gym.
• STABLE 12-SIDED POLYGONAL BASE: Our signature 12-sided plates provide a stationary, rock-solid foundation for floor-based movements like renegade rows and push-ups. Steady and Safe.
• ADJUSTABLE LENGTH: Unlike fixed-length dumbbells that stay bulky, this unit physically shortens from 14.17" to 6.65" as you drop weight, ensuring a natural range of motion without the gear hitting your body.
• 1-SECOND QUICK WEIGHT SELECT: Stop wasting time between sets; the intuitive pull-pin mechanism allows for lightning-fast transitions between 10, 20, 30, 40, and 50 lbs to keep your heart rate and momentum high.
• PRO-GRADE LOCKING SECURITY: Train with absolute confidence using our patented safety dovetail mechanism that keeps the plates tightly fit and silent, delivering a secure, rattle-free lift even during explosive movements.