Tulip Poplar wedges are the industry standard wood wedge for striking tool installation. Tulip poplar is a hardwood, but it is not the hardest of hardwoods. It works well for wedging because it compresses some and is easier to shape for fitting purposes. All handles we sell that need a wedge come with a poplar wedge. Perhaps you didn't notice, but we also have hickory and black walnut wedges if someone is looking for something different than the standard.