DURABLE AND SAFETY: Oversized Diameter Tubing And Anti-rotation Inserts For Greater Stability, Protects Your Bike's Finish With Non-Marking Plastic Clamps. Constructed Of Rust-resistant, Sturdy Steel With Black Powder Coat Finish. DESIGNED FOR USE: Ideal For Mounting Your Bike To A Car Rack Or Home Storage Unit, An Alternative Way Which Allows The Bike Didn't have One Straight Bar Cross, To Have Extra Clearance When Putting Your Bicycle on Hitch Boot Bike Ute Tow Ball Spare Wheel Car Rack or Vertical Home Bike Storage Rack. EASY TO USE: Installs Quickly And Securely To Your Seat Post And Stem To Adopt A Wide Range Of Bikes For Transport, Keeps Your Bike Mounted Solidly On Single And Dual-arm Mounts Attaches To Your Bike's Seat Post And Handlebar Stem Post. Easy Push To Operate Pin And Interlocking Gate Keeps Each Clamp Closed. CAPACITY AND COMPATIBILITY: Adapter That Makes Your Bike Compatible With Most Mast-style Hitch Racks; Bike Capacity: 1 Bike Weighing Up To 18kg/39.7lbs - Great for Kids Ladies Dual Suspension Cruiser Small Mountain Road Bikes and Sloping Down Tubes.