This 4 way bracket is designed for a common middle bracket in a pergola.   Construction is 3/16" thick high quality aluminum with full weld coverage over joints.  Openings measure 3.6" by 3.6".   There are a total of 40 holes.
 
In addition to the bracket, you get the following
 
40x 2" Stainless Steel Wood Screws
40x Plastic washers
40x Screw caps