No, this is not one of those viral slime videos. You're looking at a process called extrude honing. But what exactly is it? Gary Kubo: Extrude honing is a hydraulically forced abrasive flow ...

But this is actually a honing rod. Misconceptions about its purpose notwithstanding, the honing rod doesn't technically sharpen a knife. As the CEO and founder of HORL sharpeners, Timo Horl knows ...