25mm Standard Barbell Spin Lock Collar Screw Clamp Dumbbell Bar Weightlifting.Collar for Weightlifting Barbell Dumbbell Bar Training Gym Exercise.HIGH QUALITY & DURABLE: Our collars are made of strong and durable 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.Colour:silverMaterial:cast ironSize:5 x 4CMPackage Contents:4 x safety nutOnly 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.