[SIMPLE INSTALLATION] - Just attach the connect tube to strollers and press the lock button to firmly lock the iron pipe to make it install tightly. It wont easily get loose while pushing the twin stroller. [WIDE COMPATIBILITY] - Works great with 98% umbrella strollers and a few high landscape stroller, perfect for two identical strollers. NOTE: The diameter of baby stroller tube must not exceed the maximum 1.18 inches (3 cm) of the chuck. [SUITABLE CROWD] - Perfect choice for parents or other people who need to take two babies go out. This connector kit makes it easy and possible for one person to control two stroller. No more worry about bringing two babies out of the house at the same time. [TWIN STROLLER CONNECTORS] - This connectors set includes 3pcs connectors: two short tube and one long tube. Easy to assemble and install on baby cart, makes two baby stroller connect firmly, turn two single strollers into a double stroller for more convenient control.