Trivia

Hard

The Diamond Grip Pattern Frequently Found On Metal Tools Is Called?

Knurl
Crow's Feet
Hash
Slip Tread
A close-up photo of diamond-pattern knurling on a cylindrical piece of metal.
Contributor~commonswiki/Wikimedia

Answer: Knurl

Even if you never knew it had a name, you’ve likely encountered it many times before. Knurl is found on everything from the handles of tools to the foot pegs on BMX bikes, and even on the barrels of some mechanical pencils.

Knurl—the k is silent and “nurl” rhymes with “curl” if you’re curious about the pronunciation—is a pattern of lines or a criss-cross pattern of ridges or indentations rolled, pressed, or cut into a surface (typically on metal objects) to make it easier to grip and use the object with bare or gloved hands. The most common pattern is the diamond pattern wherein the end result, seen here, is a pattern of tiny pyramidal diamond protrusions on the object.

The word comes to us by way of the Middle English word “knar” or “knot in wood”. Interestingly, while the word “knar” vanished, it left behind a variant, “gnarl”, which we still use to this day to describe rough and knotty protuberances on trees.

Trivia

Hard

The “Armstrong Limit” Is A Measurement Of The Maximum Amount Of What A Human Can Edure?

Trivia

Hard

The Bearded Vulture Survives Almost Entirely On A Surprising Diet Of?

Trivia

Hard

Walt Disney’s Final Act Before Death Was To Write Down The Name Of Which Actor?

Trivia

Hard

The Second Apollo Moon Mission Was Almost Aborted Because Of?

Trivia

Hard

Maryland Has An Official Holiday Celebrating Which Video Game Franchise?

Trivia

Hard

What Beverage-related Item Was Invented Entirely By Accident?

Trivia

Hard

Which Video Game Console Was Shipped In Secrecy At Night To Avoid Mobsters?

Trivia

Easy

Mycotoxins Are Toxins Produced By?

Trivia

Very Hard

Cromniomancy Is A Form Of Divination That Relies On Reading?

Trivia

Hard

In Hong Kong, The Majority Of Residents Flush Their Toilets With?