York Fitness Standard 1" Chrome Spinlock Collars are designed for standard 1" spinlock dumbbell bars and barbells. The heavy duty thread on the chrome plated collars ensure a tight fit. The rubber edge on the collars further improves fit and prevents slipping. Key Features: For use with Standard 1" spinlock bars and barbells. Rubber-edged Anti-slip tightening collar. Heavy duty thread. Smoothly contoured fingertip grip. Chrome plated. Sold as pairs. SPECIFICATION: Brand York Fitness Usage Home Use, Commercial Use Condition Brand New