Purpose and benefit Keeps weight plates or dumbbell heads firmly in place on the bar to prevent slipping, wobble, or unwanted movement during lifts — improving safety and workout focus. Fast to install and remove so you can change weights quickly between sets or users. Key specifications Inner diameter: 2.5 cm — fits handles or bar shafts with a 2.5 cm diameter. Material: high-quality stainless steel — rust resistant, corrosion resistant, and built for high strength and long service life. Why this product stands out Durable stainless construction resists sweat, moisture, and rust for reliable performance in home, garage, or commercial gym settings. Simple design that provides a secure lock without complicated tools or mechanisms, minimizing setup time and maintenance. Performance highlights Secure hold under repeated use and heavy load conditions. Low maintenance: stainless surface is easy to clean and resists corrosion over time. Consistent fit for bars with the specified inner diameter; maintains alignment of plates for balanced lifting. Typical use scenarios 1. Home gym: Quickly clamp dumbbell heads for safe single-arm exercises, drop sets, or paired workouts where fast weight changes are needed. 2. Commercial or shared gyms: Provide a dependable, rust-resistant solution for daily heavy use and multiple users. 3. Physical training and rehab: Keep small dumbbells securely positioned during controlled, repetitive movements or assisted exercises. What to check before purchase Confirm your bar or handle shaft diameter is 2.5 cm to ensure proper fit and secure performance. Made from robust stainless steel and engineered for easy handling, this clamp/stopper secures dumbbells on the bar while resisting rust and wear — a practical, long-lasting accessory for safer, more efficient workouts.