<BR> Features: <BR>1 Made of heavy-duty steel with a welded hitch arm at an approximate 45-degree angle for ideal attachment position for many types of bicycle trailers. <BR>2 Attaches to the bicycle rear axle with the rear axle nut. <BR>3 Usable as a convenient and safe hitch for bicycle trailers to attach to. <BR>4 It suitable for bikes and kinds of trailers. <BR>5 With an additional trailer coupler attachment, both Mom and Dad's bikes can be outfitted to tow the kids trailer, your kids will enjoy the bike ride. <BR>Specifications: <BR>Type:Trailer Hitch Mount <BR>Made:Steel <BR>Hole diameter where axle attaches:10mm <BR>Color:Black <BR>please note that the shaft diameter is about 0.59 inches. Please check whether the trailer is suitable. <BR>Recessed area diameter where axle nut screws onto:20mm <BR>Hole diameter in hitch where the trailer attaches:6.5mm <BR>Base plate length:55mm <BR>Package included: <BR> Trailer Hitch Mount * 2 pack