A compression tool suited for aiding the installation of gas cylinders, especially for the underside of fold-and-roll tables. The tool comprises a generally C-shaped clamp subassembly having a lower jaw, an upper jaw, and an arm. A spindle is connected through the upper jaw, the spindle having a spindle lower end. An upper channel member, preferably U-shaped, is connected to the spindle lower end, the upper channel member configured to travel axially along the spindle and engage a first eyelet of a gas cylinder. A lower channel member, also preferably U-shaped, is connected to an outer end of the lower jaw in alignment with the upper channel member, the lower channel member configured to engage an opposing, second eyelet of the gas cylinder, wherein the gas cylinder is compressed and secured within the clamp subassembly and immobilized for installation.