A tape measure comes with several markings that some may not know, like the black diamonds. Here's what those symbols mean and how you can use them.

It's important to find a tape measure of an appropriate length for your needs. If you 're going to use it for general household tasks or DIY projects, a standard 16- or 25-foot option will more ...

So what does the black diamond on a tape measure mean, and what other symbols on the tape measure can be useful? Black diamonds seem to show up at irregular intervals along the face of a tape measure.