This is one part of a tower that is designed to be built in sections. Part 01 is the entry level and will past north of your position. Part 02 has Up and Down Versions and can be stacked as many times as you like. You must be facing the center column of Cobblestone and it must be north of you. Load Part 2 Down and paste and you can build the tower down. To build up you need to go to the top of the section, be on the slab that is to the north of the cobblestone in the center of the tower. Load either Part 02 Up or Part 03 and paste. Part 03 also has two versions Oak and Cobblestone and is the tower topper.