Core Treehouse Attachment Bolt (TAB) exclusive to Treehouse Supplies Looking for a reliable and affordable solution for your treehouse project? Our CORE TAB is engineered to provide you with peace of mind. With a 1.75" diameter stem, it offers greater wood compression than a standard lag bolt, ensuring a secure and stable connection to live trees. The CORE TAB's wood threads are specifically designed for a firm grip, and its 1.25" diameter perch makes it compatible with all our standard brackets. Ideal for supporting structures up to 100 square feet, the CORE TAB is perfect for building a backyard treehouse that your kids will love. Just like our original bolts, the CORE TAB has a wide range of compatible brackets, allowing for versatile support of treehouses of various sizes, shapes, and heights. All our bolts and brackets are designed to accommodate tree movement and growth, ensuring both the safety of your treehouse and the health of your trees. Recommended Installation Tools: Drill Bit Rental Kit: For boring the hole where the TAB will be installed. TAB Ratchet: For turning in the TAB without damaging its exterior. Water Level Tube: Essential if installing two or more TABs to ensure proper alignment.