ITEM NAME:Blue Marking Center Finder Centering Scriber Woodworking Tools Marking Gauge Marking Center Finder Centering Scriber Woodworking Tools Marking Gauge SPECIFICATIONS.(Item included: 1 x scriber (Without Pen). 3) First sharpen the pencil and insert it into the scribe. 3) Center hole holds pencil in perfectly centered position as you scribe your line. 2) Ideal for marking out mortises and rabbets.