3/16-1/2inch Concrete Drill Bit Set 10PC, Masonry Drill Bits for Brick, Glass, Plastic and Wood

Made of Premium carbide alloy with anti-rust treatment and a reinforced head prevents bit cracking and provides a longer life.It is suitable for Glass, Ceramic, Tile, Mirror, Plant Pots, Wood,Porcelain, Brick Wall, marble, thin iron plate etc. Please try to keep the drill vertical and keep bits cool with a flow of cooling water; dont use on hard tile.

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