The Baby Jogger Infant Car Seat Adapters let you quickly and easily turn your Summit X3 single stroller into a customized travel system. Use these adapters to attach your Baby Jogger or Graco infant car seat to your Baby Jogger Summit X3 single stroller. • Fits Baby Jogger Summit X3 single stroller • Only compatible with certain Baby Jogger and Graco infant car seats. Baby Jogger - City GO 2. Graco - all SnugRide infant car seats, Turn & Slide infant car seat • These car seat adapters convert your Summit X3 single stroller into a travel system with certain Baby Jogger and Graco infant car seats. • No tools required to install • The Summit X3 single stroller will fold with the car seat adapters on