Allows you to use the following car seats: Safety 1st® onBoard? series, Maxi-Cosi® Cosi35, Graco® Snug Ride ®, Snug Ride ® 30, Snug Ride ® 32 and Snug Ride ® 35, Peg Perego® Primo Viaggio, Chicco® KeyFit? and KeyFit? 30, Combi® Shuttle? 33, Britax® Chaperone?. No straps required! Quick Click Attachment for Safety 1st® onBoard Infant Car Seats.