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The drill bits in the set are used to drill into masonry, thanks to theuniquely designed TCT (tungsten carbide tipped) point.
A percussion (hammer action) drill with a 3 jaw chuck is required. Preset thedepth gauge on the drill to achieve the correct depth before drilling intowalls.
TIP:
Have a wall scanner (detector) ready before drilling into walls.
CAUTION:
Do not use the drill bits in the set with a rotary hammer. The impact energywill break the conversion chuck.