These innovative multi-purpose drill bits are designed for drilling into all materials including wood, masonry, ceramics, UPVC and even steel. This is achieved by diamond grinding the tungsten carbide tip to produce a multi-material ability. As with all cutting tools, it is essential to clear the waste material quickly and Bosch have achieved this by providing a steep aggressive flute. For strength and to withstand both rotary, impact and all purpose drilling, the tungsten carbide tip is set and brazed into the drill head to precise criteria. Supplied singly.