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Q:drill bit which is better thunderbolt titanium or black Oxite
A:Generally speaking, Black Oxide tends to be the best
A:I haven't used the thunderbolts but the black oxite do a good job in soft angle iron, etc.
Q:Are these bits CARBON or HSS coated with TIN?
A:These bits are made with a high carbon steel coated in titanium.
Q:what is the warranty on the drill bits
A:The warranty is for product defects only
Q:Are these bits a good choice for drilling stainless steel? How do they stack up against cobalt tip bits specifically recommended for SS drilling?
A:Cobalt and titanium drill bits are designed for speed and longevity. Cobalt drill bits are made of a solid composition of steel and cobalt; titanium drill bits are made of steel with a thin titanium coating that is harder than cobalt. Although both types are capable and long-lasting, there are a couple of significant differences between them