Different sizes: Available in three sizes to fit weight discs with diameters of 25 mm, 28 mm, and 30 mm. Refer to the product images and details for accurate measurement and size selection. Contact the seller if unsure about the correct size. High-quality materials: Made from durable spring steel and high-grade plastic handles. The construction is sturdy, firm, and designed for reliable performance. The materials are clean, safe, and environmentally friendly, allowing for quick and easy assembly and disassembly. Exercise safely: Designed to securely hold weights during intense workouts. Ideal for dumbbells, squat machines, and other strength training equipment. Provides dependable performance for weightlifting and fitness training. Easy to use: Features a firm grip with a comfortable, soft plastic handle for simple installation and removal. Just attach the clamp to the equipment and secure it in place. Wide range of applications: Compatible with both smooth and textured bars. Helps adjust dumbbell weights quickly and safely, suitable for gym, home workouts, weight training, and bodybuilding. Material: Plastic + stainless steel 2.5cm model: Inner diameter 2.5 cm, length 8 cm, fits rods between 2.5–2.6 cm 2.8cm model: Inner diameter 2.8 cm, length 8.5 cm, fits rods between 2.8–2.9 cm 3.0cm model: Inner diameter 3.0 cm, length 8.5 cm, fits rods between 2.9–3.0 cm