Did you know? The Janka Test measures the force required to embed a .444 inch steel ball into wood by half its diameter, and it is used to determine the ability of a wood specie to withstand denting and wear.Important when choosing the right hardwood flooring for your space, whether than be a high-trafficarea like your hallway or kitchen, or a basketball court.The chart featured here shows you the measurement formore than 20 hardwood species.Now you know.