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Using a friction drill

Friction drills used to build powerful connections, as it does not remove metal from the hole, but the melt and create a strong wall around the hole. So, a screw can be caught with more bends in the metal and the link to become much stronger. The friction drill bits manufactured from tungsten carbide, a material 3 times stronger than steel. Here our Piet Hein shows how friction works a drill.

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