Thread Tap Drill Bits Review 2021- Does it Work?

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The thread drilled by the drill is very reliable. Even if you do not use an electric drill, you can easily screw in the screws just by hand, saving a lot of work time.
Made of High-Speed Steel 4341 material, higher hardness, more durable. Applicable to some types of carbon steel and ordinary steel, copper and aluminum-magnesium alloy drilling hole. Six different sizes of drill bits can help you get different sized holes.
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extend the life of your bits and add some lubricant when doing this but also make sure you use the right bit depending on thickness of material

kisketchup
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Don't you need to pre-drill a hole before you attemp at tapping it?

la