The Large Shelf Bracket is the strongest front mount shelf bracket available on the market. This bracket is made to handle the heaviest and largest of jobs, because of the vertical angle welded in place. It is ideal for interior and exterior applications as it is made of steel material painted with our Rust-Inhibitor Paint.Give yourself or your customer the peace of mind they deserve by having the strongest countertop support bracket on the market with the Large Shelf Bracket.This bracket is designed to mount into wooden studs or the equivalent, from the front, to support a shelf or countertop.How to determine what size bracket:The bracket will be mounted to the outside of a wall or cabinet. Measure the depth of the shelf or countertop you are mounting and subtract 2-4 inches from that number. For example, if your shelf or countertop has a depth of 22 inches, subtract 3 inches to get 19 inches. This subtraction is to stay away from the outer edge of the countertop, which is usually 2-4 inches. Since your measurement is 19 inches, you will order a 20x10 Large Shelf Bracket.Dimensions of the Large Shelf Industrial Bracket:Horizontal:-Length "“ [Select your chosen length when ordering bracket]-Width "“ 2 1/2 inches-Thickness "“ 1/4 inchVertical:-Length "“ 10 or 12 inches [Determined by size of bracket]-Width "“ 2 1/2 inches-Thickness "“ 1/4 inch-Hole Diameter "“ 1/4 inchVertical Angle:-Width "“ 2 1/2 inches-Thickness "“ 1/4 inch