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You probably have a good idea of how things around you work, especially items in your home. But chances are that there are some features in household items that you had no clue about, especially items that have been around awhile. Either this information was forgotten or wasn’t common knowledge to begin with.

In addition, the Modern Age has brought many new innovations, including features built into the items we use every day. And, unless you pay attention, you might miss them or fail to take advantage of them. Fortunately, this slideshow brings many of these strange but brilliant features to light!

Check out the following slideshow to learn about a whole slew of household item features that you had no idea existed, including use for the tabs in the ends of a roll of aluminum foil, why dress pants have creases, and how to correctly replace the blade on a utility knife.