14" needles are designed for lever or Irish knitting; when you hold one needle under your arm, which helps you knit much faster. If you haven't tried it yet, I recommend this technique since you have much more control of your work.
These metal needles are great if you like to knit FAST! They have a long sharp point that helps pick up stitches, especially if you are using small needles and fingering or lace yarn. The smooth surface makes it really easy for stitches to slide to the other needles. This is your choice if you like to knit fast or knit very tight. They are also surprisingly light so your hands don’t get tired.
They are made out of brass needles and are chrome-plated which makes them a durable option.