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. Priced Individually.
Features:

• 3 x 3 Inch Overall Outer Dimensions measured both ways. (76.20 mm)
• 5/8 Inch Center Hole (.625 actual, 15.88 mm)
• 3/16 Inch Thick (.175 Inch, 4.45 mm)
• Works great for rollcages, steering setups, making attachment points on rollcages for bungee cords, nets, etc.
• This is a 90 degree gussett