Moose is a simple light and reliable 2 arms bike carrier that fits any 50mm tow ball good design good quality to safely transport up to 3 bicycles cradles and rubber straps help position and secure the bikes arms can easily fold when not in use complete rack tilts down for boot access strong easy to use locking system to fit any iso 50mm tow ball these carriers are supplied ready to go no assembly work is required the patented conical tow ball clamp fits onto all 50mm diamete