Only one BK Tree Step Installer required. Does not include the tree step or drill. Insert the BK Tree Step Installer Into your drill, install the step into the BK Tree Step Installer, then simply drill your step into the tree. Continue with as many steps as you need to install. Introductory price of only $19.95 + shipping. Made of steel Weight only 7oz Works with Ameristep rod style screw in tree steps 3/8 shaft Made locally Patent Pending Also available at our Web Site. bktreestepinstaller.com or on Amazon.com. Visit us and watch the instructional video as he installs 6 steps under 4 minutes.