Pocket knife measures 8.25" open, 4.5" closed with a 3.75" blade.

Pocket knife measures 8.25" open, 4.5" closed with a 3.75" blade.

Pocket knife measures 6" open, 3.5" closed with a 2.5" blade.

Pocket knife measures 6" open, 3.5" closed with a 2.5" blade.

Pocket knife measures 7.75" open, 4.5" closed with a 3.25" blade.

Pocket knife measures 8.75" open, 5" closed with a 3.75" blade.

Pocket knife measures 8" open, 4.5" closed with a 3.5" blade.

Pocket knife measures 8" open, 4.75" closed with a 3.25" blade.

Pocket knife measures 8.5" open, 5" closed with a 3.5" blade.

Pocket knife measures 8.75" open, 4.75" closed with a 4" blade.

Pocket knife measures 9.5" open, 5.5" closed with a 4" blade.

Pocket knife measures 9.5" open, 5.5" closed with a 4" blade.

Pocket knife measures 8.75" open, 5" closed with a 3.75" blade.

Pocket knife measures 7.5" open, 4.25" closed with a 3.25" blade.

Pocket knife measures 7.25" open, 4" closed with a 3.25" blade.

Pocket knife measures 8" open, 4.5" closed with a 3.5" blade.

Pocket knife measures 8" open, 4.5" closed with a 3.5" blade.

Pocket knife measures 8" open, 4.5" closed with a 3.5" blade.

Pocket knife measures 8" open, 4.5" closed with a 3.5" blade.

Pocket knife measures 8.25" open, 4.75" closed with a 3.5" blade.

Pocket knife measures 7.75" open, 4.5" closed with a 3.25" blade.

Pen knives are actual pens that could save your life. They look like an ordinary pen, but feature a 2.13" blade that is revealed by pulling the pen apart.