Twenty-Four Inch  Center-Finding Ruler - The ruler is twenty-four inches long and two inches wide and made of florescent green, durable cell-cast plexiglass.  It is a big, hefty ruler.  Its top edge is a center-finding ruler, with markings in 1/16 inch increments.  The bottom edge is a standard twenty-four inch ruler with markings every 1/8 inch.   On the side edges are markings every 1/4 inch.  This center-finding ruler allows you to find the center of a piece, or to make an element the center of your block.   This Top-Quality heavy duty workhorse of a ruler had markings that are all laser-engraved, they will never wear off from use.