Claw (Bullet) Construction Bits are designed for medium to hard formations. They feature carbide-tipped bullet cutters which rotate in their holders providing a self-sharpening action. These inexpensive cutters are field-replaceable and are rated at up to 10,000 PSI rock. This durable, aggressive bit can be used to cut hard compacted clay, sand rock, shale, and soft limestone formations with a rapid penetration rate.