These are builder tabs for people on a budget. These are puzzled into our sheets when making other products- so we can offer them at a lower cost. All Economy Builder Tabs are laser numbered to avoid confusion. Sold Individually.
Features:

• 3 1/2 Inch Long Overall (88.9 mm)
• 2 1/4 Inch Tall Overall (57.15 mm)
• 5/8 Inch Hole (.635 Inch actual, 16.13 mm)
• 3/16 Inch Thick (.175 Inch, 4.45 mm)
• Measurement from center of hole to flat is 1 3/8 Inch (34.93 mm)