Each crotch leg is composed of seven segments (starting from the body, these are: coxa, trochanter, femur, patella, tibia, metatarsus, and tarsus).

An excerpt from the article 28 facts about spiders

The tarsus ends with claws, the number and length of which vary depending on the spider species. Web-weaving spiders usually have three claws, while actively hunting spiders usually have two.