Carbide-tipped bits are required to drill into __________.

Carbide-tipped bits are specifically designed for drilling into hard materials, and they are particularly effective for masonry applications. These bits feature a cutting edge made from carbide, which is a very hard material that enables them to penetrate tough surfaces such as concrete, brick, and stone. The structure of carbide allows these bits to withstand the high levels of wear and heat generated when drilling into such dense materials.

In contrast, wood can typically be drilled using standard high-speed steel bits or spade bits, metal often requires drill bits made from high-speed steel or cobalt, and plastic is generally processed with bits designed to prevent melting or chipping, none of which necessitate the specific hardness and durability of carbide-tipped bits. This is why the requirement for carbide-tipped bits is associated with masonry, as they allow for efficient and effective drilling in these challenging surfaces.