Made from aircraft grade aluminum, the Extendible Bow Arm extends from 8. 75" to 16. 5" and weighs 8 ounces. The oversized, molded soft-grip hook rotates 180 degrees to allow for precise positioning and the Anti-Spin TreeCam lever eliminates unwanted spinning or movement of the bow arm. Quick and easy to install with hardened steel Auger-Tip. .