Bike trailer hitch coupler for Instep and Schwinn kids/dog bike

12.2mm bike trailer hitch coupler for Instep and Schwinn bike trailer allows you to attache an Instep or Schwinn kids or pet bicycle trailer to almost any bike.
Easy to Install: Just need 1 minute to install it on a quick-release axle bike.
Safe and Comfort: With an additional coupler attachment, 2 bikers can tow the trailer in turn and don't need to exchange the bikes they ride. We all know it's uncomfortably to ride a unsuitable size bike.
Life Style Pass On: Take your kids or pets to breath some fresh air and enoy the moment, showing people that our life stlye our exercise can be so environmental.
Package Include: 1 Lock Pin, 1 Coupler, 1 Lock washer.