Early chisels made out of flint that date back 10, 000 years have been discovered, while more modern incarnations are made out of tempered steel.

FORBES: Magazine Article

It has the penetrative force of a piece of heavy industrial equipment, something with a diamond bit or tempered-steel blades.

NEWYORKER: Magda Mandela

President Nursultan Nazarbayev, a former Soviet official, has ruled with a tempered-steel grip since independence in 1991 by focusing on the economy--Kazakhstan's GDP last year jumped 8.7%--and opening doors to outside investors.

FORBES: Power Putsch

Umasi, a collection of work by artist Wells Mason, blurs the line between sculpture and furniture, with man-made materials such as stainless steel and tempered glass colliding with organic (exquisitely finished woods) and even obviously salvaged materials (a telephone pole, recycled rubber, bicycle parts).

FORBES: Above photo courtesy of John Langford