Centipedes are predators. They kill their prey with their venom claws and use their mandibles to chew on it. Appendages of the first body segment are modified to form venom claws. These claws may resemble legs but they are not used for locomotion. They do not use these claws for walking purposes; only for capturing prey and eating. These venomous claws act like strong jaws for the centipedes and it helps in predation. The venom is strong enough to imminently attack the cardiovascular, respiratory, muscular, and nervous system of the prey targeted. The largest species of centipedes are able to kill birds, reptiles, and small mammals with the help of these claws. To humans, a centipede bite can be life-threatening because of their venom.
This is an incredible video of a giant centipede using its venom claws to eat a bat! Notice how the centipede’s venom kills the bat quickly.
Sources: https://micro.magnet.fsu.edu/optics/olympusmicd/galleries/oblique/centipedepoisonclaw.html
https://www.chemistryworld.com/news/deadly-component-of-centipede-venom-identified/3008568.article