25mm Standard Barbell Lock Collar Screw Clamp Dumbbell Bar Weightlifting. Collar for Weightlifting Barbell Dumbbell Bar Training Gym Exercise. HIGH QUALITY & : Our collars are made of strong and material for long-lasting use. Barbell clips hold the weight plate securely and securely while lifting weights. Widely Applicable: Perfect for bumper board use and platform lift workouts. GREAT GIFT: The collar set is a great gift for weightlifting lovers.<br><br>Colour:silver Material:cast iron Size:5 x 4CM<br><br>Package Contents: 4 x safety nut<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.