MESHA 2" Pair Black Heavy Duty Plastic Olympic Lock-jaw Barbell Collar Secure Quick Release Snap Feature For Crossfit Strength Weight Training, Collar holds Weights Plates by Mighty Claws Clamps Fits all Olympic barbell sleeves (2") Sturdy innovative design, very practical and convenient One-hand fast installation and removal Solid injection molded frame Sturdy innovative design, very practical and convenient