A frame having upper and lower longitudinal frame members supports pairs of pivotally connected holding arms having curved “J-shaped” distal ends and curved blades mounted thereinbetween. Latch arms pivotally connect to one another on one end and to a short upper frame member and a short lower frame member of the longitudinal frame members support a disassemble cylindrical cam latch and lock assembly mounted onto the upper latch arm. A travel pin moves up and down within a predetermined channel or groove formed in a solid one piece cast cylindrical bushing and rotates in a predetermined pattern to simultaneously rotate and move a locking dog and a wedge shaped plunger extending downwardly therefrom up and down and in for cooperative engagement with a slot or keyhole formed in the lower latch arm thereby engaging or disengaging the “J-shaped” holding arms. The cylindrical cam mechanism is activated by lifting and/or lowering the tube bundle lifting unit onto the ground thereby causing the travel pin, locking dog, and plunger to rotate to preselected positions to lock or unlock the holding arms. Dropping the open holding arms on the ground releases tension on and activates the cylindrical cam locking mechanism so that upon raising the lifting arms they close around the tube bundle. Upon lowering and lifting the tube bundle lifting device to the ground takes the tension off of the cylindrical cam locking mechanism so that the cam assembly holds the arms in the open position to be removed from the tube bundle.