The partition walls can be joined together so that they are still movable, using a pole with eyelets and can also be positioned in three directions. The rolling casters (two of them locking) attach to the high walls to make them stable but easy to move around. Attachment bar also allows the partitions to be attached to a wall. This creates flexible partition wall combinations for play areas. Zigzag shelves or learning stations can also be built with connecting rods and eyelets. Made of Birch. Steel tube, powder-coated in silver gray (RAL 9006) and scratch resistant. Heavy duty casters. 2-Piece Set.