These are the T-shaped screw-type collars that came with the IROTEC Regular W Bar, 28mm diameter. - Brand: IROTEC - Type: Clamp for shaft - Feature: T-shaped screw-type collar - Material: Metal - Hole diameter: 29mm - Quantity: 2 #StrengthTraining #WeightTraining #Dumbbell #Barbell #Collar #TScrewCollar To prevent any issues, please check the condition of the item in the photos before considering your purchase. As this is stored at home, please refrain from purchasing if you are sensitive about such matters. 〇Product Notes〇 Please note that the color of the product may differ depending on the shooting environment and your device. Thank you for your understanding.