Machines and machine tools, namely, quick-coupling systems for fork lift attachments comprised of couplings for fork lifts, and fork lift attachments, namely, scrap grapples, wood grapples, snow plows, forks, jib cranes, buckets, telescopic forks, multiple load handlers, rotators, tilting carriages, drop-bottom box dumpers, fork positioners, fork clamps, pivoting fork clamps, block and brick clamps, bale clamps, carton clamps, drum clamps, paper roll clamps, load stabilizers, boom attachments...