1. Material: plastic
2. Reinforced plastic chuck, easy to use, one-key opening and closing
3. Chuck can better lock the OB lever
4. The plastic safety buckle of the barbell bar is suitable for standard Olympic bars with an inner diameter of 2 inches;
5. Fast lock to buckle the bell piece, not easy to slide, safe weightlifting bench press
6. Weight: 150 grams
7. Size: 20mm; 30mm
