The column height above the bed can be adjusted by loosening the set screw in the knurled collar on the column with a 9/32" hex wrench and sliding the column up to the desired height while holding the collar in place. Tighten the set screw when the desired height is achieved. | The column height above the bed can be adjusted by loosening the set screw in the knurled collar on the column with a 9/32" hex wrench and sliding the column up to the desired height while holding the collar in place. Tighten the set screw when the desired height is achieved. |