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Similarly, where a standard cobalt bit may be too brittle ... The secret to the Metal Demon™ Drill Bits for Mild, Hardened and Stainless Steel's superior performance is Diablo's commitment ...

I'm trying to figure out which type of bit is best for drilling thru about 1/4" of galvanized steel. I recently used a standard carbon-steel bit to drill ... Cobalt steel<BR><BR>Looking at 1/4 ...

Industrial-duty versions of twist drill bits are made from various forms of high-speed steel (such as a cobalt-molybdenum alloy, M42), and these bits may also have a wear-resistant nitride (or ...

Moly drill bits work well with mild steel. Cobalt bits are expensive and best choice for the abuse common in farm shops, but…drill bits by definition are “consumable items.” The differences ...

It turns out that a hot solution of alum (ammonium aluminum sulfate), which is available in the spice rack of your local supermarket, will dissolve the steel ... for larger drill bits, but the ...

Diablo's Metal Demon™ Drill Bits for Mild, Hardened and Stainless ... deliver inconsistent performance, or cobalt bits that are limited to stainless steel or other very brittle material with ...