The new INCRA Precision Specialty Rules 6" x 3" X-Y Marker measures from both edges of a corner in one operation! Locate drill centers fast and accurately for positioning and installing cabinet door knobs and handles, installing casters on furniture, or marking flute lines. One or both t-bars can be easily removed for single edge referencing or flat work. And like all INCRA rules, the easy-to-read no-glare matte finish along with the unique grid layout make finding and leaving your mark effortless. Technical Details: Rule measures 6" x 3". Makes it easy to measure and mark reference points from either edge of a corner. Makes positioning and drilling holes for cabinet door knobs and handles a breeze. One or both t-bars may be easily removed for single edge referencing. Easy-to-read no-glare matte finish. Unique grid layout makes it easy to find your mark.