lightweight reinforced modular tubes of extruded plastic material are provided for the first stage of a trolley - type carry case , in combination with a locking mechanism , which facilitates effective extension and collapse of a multi - telescopic handle system . the tubes are made of extruded plastic material and include a pair of opposed metal strips having appropriately spaced and dimensioned apertures for reception of spring loaded locking pins of the telescopic system . the metal strips are respectively retained in position by a pair of radially extending elongated flange members which overlap marginal positions of the strips . the tubes and the metal strips can easily and quickly be cut to size to fit any size carry case . while the metal insert strips are preferably made of aluminum , any material stronger than the extruded plastic of the first stage tube can be used , i . e ., steel , nylon , pvc , polyethylene , polycarbonate , or the like .