How do the purpose of tentacles and arms of a squid differ?

Squids have four pairs of arms and a pair of tentacles.
The tentacles are longer than the arms. The tentacles perform the function of grabbing
prey and holding on to it. There are hooks on the arms as well as the tentacles of
squids but the ones on the tentacles can swivel while those on the arm cannot. These
help squids hold on to their prey better while the prey tries to escpe. Suckers are
present on both the arms as well as the tentacles of squids, though the ones on the arms
are bigger.