Plunger

In one account of the genesis of the Daleks, Mr Castavillian placed a plunger which the Fourteenth Doctor retrieved from the TARDIS on the first Dalek to replace the multi-dextrous claw which the TARDIS' accidental arrival broke off. Discovering this modification of the casing he created, Davros decided that he liked it, (TV: ) leading to what would become known as the suction cup. (PROSE: Dalek Combat Training Manual)

After 's body was augmented by "superior" Dalek technology, he had a plunger in place of a right hand, though Emma pointed out that the Master didn't know what it could do. (TV: The Curse of Fatal Death)

Upon seeing a Dalek at a UNIT warehouse, Cleo Proctor observed that it had a toilet plunger sticking out of it. (AUDIO: Recruits)