The Panmixer "spider" is a full replacement set of paddle shoes with paddles; along with clamps attached to a panmixer spider head. This replacement set includes the shaft key to secure it onto the vertical motor shaft.
 
Typically, the full spider isn't required as a total replacement unless weather elements have corroded the metal; a critical failure has damaged the existing clamps or a discount bundle purchase avails itself. Individual paddles can be replaced for a reduced cost several times before replacing the total spider set.