This kit includes upgraded 3 wide pins for your LCA bow press. Install these pins onto any LCA green or Pack-N-Go bow press model. When upgrading, you'll use an included pin pusher to remove the narrow 2.5 pins, and you'll use the same tool to install the 3 pins to help accommodate wider limb compound bow models hitting the market. Interchange the pins easily following a few simple steps. See the instructional video below. 2024 Mathews bows will require these wider blocks, but the additional width can also help with other models like Prime, Elite, Bear, Hoyt, PSE, and more. If you have an LCA bow press that's copper in color, purchase the 3 Block Kit instead of the 3 Pin Kit.