We provide indepth ladder jack reviews of the best known brands in the business. A ladder jack is a triangular shaped bracket which attaches to a ladder. This is a very portable and affordable solution to create a mean of support for a platform. Ladder jacks are typically used in exterior construction, such as painting, trim work, and applying finishes. Contractors use ladder jacks because they are quick to setup, very affordable, and to transport. There are several type of ladder jacks but the main types are the Side Rail Ladder Jack or Over the Rail and Rung and 2 or 3 Rung Brackets which are over the rung only. The main brand in the ladder jack world is Werner in addition to Louisville and Qualcraft. Take a look at the chart below at the top ladder jack reviews.