The American Barbell Proloc Collar 1 is constructed of high-strength, ultra-durable nylon and fits most Olympic bars with a diameter of 1.937" to 2.007".  It can be quickly tightened and loosed using the easy twist knobs and remain securely fastened in the most intense training environments.  

Proloc Collar 1 integrates powerful internal magnets enabling the collar to be conveniently stored on a steel rack.

Specifications:

• Made in the USA
• High-Strength Nylon Construction
• Compatible with Olympic Bars 1.937" to 2.007" in diameter
• Sold in pairs
• Easily adjustable
• Two-Year Warranty