- This sturdy trailer hitch will be very useful if you want to use your bicycle trailer with several bicycles.- The angled bicycle connector is ideal for easily and quickly attaching your trailer to your bicycle.- Allows you to easily mount your trailer to multiple bikes.- After initial installation, no other tools are required to mount and dismount your trailer. Details:Product name: Trailer hitchColor: BlackMaterial: SteelDiameter of the hole where the axis is fixed: 11mmRecess diameter on which the axle nut is screwed: 21mmDiameter of the hole in the hitch to which the trailer is attached: 6.8mmBaseplate length: 55mmPackage includes:2 x Bike Trailer CouplerNote:Measurements both taken by hand, the Sizes shown may vary slightly.Color may vary slightly depending on your monitor settings.,