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The selection of hole cutter drill bits reflects the diverse needs of different projects. There are expendable bits for one-time uses, like those made for masonry, and there are durable ones with replaceable teeth for long-term assignments. Some are designed with pilot drills to guide the cutting process, ensuring accuracy and reducing wobbling. Others have unique features such as bi-metal designs that combine the strength of steel with the sharpness of carbon for tougher materials.

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One of the key components of rock drill tools is the drill bit, which is the cutting tool that makes contact with the rock surface. Drill bits come in a variety of shapes and sizes, each designed for specific types of rock formations. For harder rock, carbide-tipped drill bits are commonly used, while softer rock may require diamond bits for effective drilling. The choice of drill bit depends on the type of rock being drilled and the required precision of the tunnel.

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