Optional handle for trolley blue product overview optional handle for trolley blue 312951 this optional handle for the blue container trolley simply slots into place at the front of the dolly and provides a firm handle to push or pull the dolly around the variable angle joint lets you position it to suit your own height and position ensuring that you are always comfortable when transporting items handle for affixing to container dolly use with vfm container dolly with rubber surface 312953