To put a Square Peg in a Round Hole, you need to use a 059 Bracket. The 059 bracket converts round holes to square holes. It’s one of the simplest but most ingenious products that RackSolutions makes. The most difficult aspect of using an 059 bracket can be figuring out how to put the screws in. The only screws that will fit are 3/8″ long and must be installed from the side.