End Mill Set Holder

This is and end mill laser cut holder for the 10 piece grizzly end mill set seen here: http://www.grizzly.com/products/g9757

I use 3/4" x 3/4" x 1/16" aluminum for the supports or columns. This is a method that I invented. I call this self threading square tube insert method. The 4 holes on the masonite (hard board) are exactly positioned so that when they are all screwed in they "self thread" into the aluminum corners. The use of longer bolts will give a stronger hold. However for this