Fast, one-handed plate changes Large lever lets you fit and remove the collar with a single hand, speeding up transitions between sets and reducing interruptions during workouts. Secure, vibration-resistant hold Internal rubber protection grips the bar and weight plates, preventing slippage and keeping loads locked in place for safer lifts. Clear locking action Jaws slide over the bar and click closed, mechanically locking the plates so they stay fixed during movement. Compatible and convenient Supplied as a pair in black. Dimensions: 25 mm, designed to fit bars with a 25 mm sleeve diameter. Durable, reliable performance Engineered for repeated use in training environments where quick changes and consistent, firm retention are required. Practical uses Superset and circuit training: change plates quickly between exercises to maintain workout intensity and reduce rest time. Home gym and garage setups: pair with 25 mm bars to keep plates secure during dynamic lifts and everyday training. Group or class settings: fast one-handed locking makes transitions easier when multiple users share equipment. What you get Two black collars (pair), 25 mm dimensions, large lever for one-handed operation, internal rubber protection for a very firm hold, and a click-lock jaw mechanism for secure plate retention.