The Handle Connector Bar assists in push and pull of heavier loads. Use the handle connector bar by leaning your body into the bar while also pushing on the handles with your hands. Also use it to pull heavy loads, since it is easier to get a firmer grip on the cross bar. A must for those hoping to maximize load capacity! Also provides a stable point of contact for supporting elevated horizontal loads, such as logs, lumber, carpet rolls, etc. when used in conjunction with the optional Upright Posts. Attaches with two 3/8″ detent pins (included).