One of our best collars. These Heavy Duty Mega Grip Olympic Collars are made from shark skin neoprene and Velcro construction with a steel ring buckle. The Heavy Duty Mega Grip Collars are wider than our regular Mega Grip Collars, thus giving an even greater hold on the bar. Extremely durable and extra tight hold. Holds the weight plates securely on the bar without slipping. Easily slide the collar onto the bar secure the Velcro sleeve and start lifting. No moving parts to break. Can withstand abusive ware and still last for years.