A specially designed paddle, that has two pieces on the striking end, one of which adds a loud slapping down, when applied to the submissive.
These are paddles, in where a piece of leather is hinged to the top portion of the wooden striking end.
When applied, the loose leather adds a loud slapping sound, to emphasize the impact.
In addition, this added piece of leather, adds weight to the striking portion of the paddle.
It also adds a secondary impact.