The terms "tree gaff" and "pole gaff" are often used interchangeably, but there is a subtle difference between the two. A tree gaff is a type of climbing gear that consists of a pair of spikes that are attached to a strap or belt. The spikes are driven into the tree trunk in order to provide traction and support for the climber. A pole gaff, on the other hand, is a single spike that is attached to a long pole. It is used primarily for reaching high branches or fruit.