Doctor Octopus' Arms (Object) - Comic Vine

Doctor Octopus's arms are four mechanical appendages that he uses as his primary weapon and is able to control each of them through a special link. They are capable of both great strength and delicate procedures.

The Hand (comics) - Wikipedia

The BLT Episode 12: Only Fowls and Horses — Cognitive

Comic Vine Site Mashup

Comic Vine Site Mashup

The Amazing Spider-Man #88 - The Arms of Doctor Octopus! (Issue)

Marvel: Green Goblin (2002) vs Dr Octopus (2004) - Battles - Comic

Robotic arm bends like elephant trunk, Dr. Octopus's tentacles

Doctor Octopus Year One Doodles by Drasama -- Fur Affinity [dot] net

Doctor Octopus' Tentacles, Marvel Database