What’s the difference between High Speed Steel (HSS) blades and Tungsten Carbide Tipped (TCT) blades?

What’s the difference between High Speed Steel (HSS) blades and Tungsten Carbide Tipped (TCT) blades?

High Speed Steel Blades can not be sharpened and are easily bluntened
and generally provide a rougher finish. They are a cheaper alternative for general use
or when you may need to sacrifice a blade due to poor quality material.

Tungsten Carbide Tipped blades have carbide tips attached to their teeth.
They are more expensive than other blades, but they stay sharp much longer
than steel or high-speed steel and can be re-sharpened. Tips can also be replaced
if broken or lost but this is comes at some expense.

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