Butcher Block top is 1-3/4" thick, helps deaden sound, absorbs impact. Replaceable top is attached to an all- welded steel frame. Half lower shelf constructed of 12 gauge steel with 3" high lip at rear. All-welded units ship fully assembled and ready for immediate use. Available in Fixed and Adjustable heights, and with optional factory installed Locking Drawer that measures 13"W x 17"D x 4-1/2"H (Right Side Mount).