A spencer paddle is a variation of a traditional wooden paddle. It has holes drilled through the striking surface. The spencer paddle is a common spanking play accessory.
More About Spencer Paddle
The spencer paddle has holes drilled into the surface to increase the rate at which it can be swung. The less wind resistance there is with a paddle, the more forceful the strike will be. This increases the pain which also increases the pleasure created by the entire process. Typically, spencer paddles are wooden. However,paddles of any material may have holes drilled into the striking surface would qualify as a spencer paddle.