Climatic adjusters are used to keep the playfield true. Because the playfield of a shuffleboard table is wood, it will behave like any other piece of wood and will swell a little in more humid weather and contract slightly in drier conditions. This can affect the trueness of the playfield. The "climatic" adjusters will compensate for those natural occurrences. For most people, a shuffleboard table is a major investment. Before you buy a shuffleboard table, it makes good sense to make sure the company you buy it from can tell you, based on where you live, how your climate will affect your table and how and when to use the climatic adjusters. Improper use of the climatic adjusters could cause a table to crack, so check the knowledge, experience and qualifications of the people you are dealing with before you buy.