Chuck: The chuck is the front end where you insert and secure your drill bit. Most drill/drivers have a keyless, ½-inch ...

Find the latest China Tungsten And Hightech Materials Co.,Ltd (000657.SZ) stock quote, history, news and other vital information to help you with your stock trading and investing.

Business news from the Chicago Tribune. The latest reporting on business, real estate and transportation in Chicagoland.

The Company Manufacture tungsten oxide, mixed tungsten carbide power, tungsten carbide blankets, tungsten carbide tipped integral rock drill steels, detachable bits and extension drill steel equipment ...