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:

• 2 7/16 Inch Long Overall when setting flat. (61.91 mm)
• 2.41 Inch width Overall (61.37 mm)
• 3/4 Inch Hole (.760 Inch actual, 19.32 mm)
• 3/16 Inch Thick (.175 Inch, 4.45 mm)
• For 3 Inch Tube (76.2 mm)
• Measurement from center of hole to radius is 1.125 Inch (28.58 mm)