What size is the opening of the stake hole on a 1'' Stacking and Anchor Bracket? August 03, 2020 15:31 Updated 1. 1/16 Inches Related articles What is the width of a 2'' Straight or Curved Composite Board? How far does a 1'' Anchor Joint extend into the ground? How many curve boards does it take to make a complete & perfect circle? What is the difference between Frame It All 1 Inch and 2 Inch Profile Boards?