Studs are the best and most used antiskid device for tires today. Cemented carbide has, due to its extreme hardness, contributed highly to this state. The paper reviews the history of antiskid devices, and states the basic principles for the construction and function of studs as well as their fitting into tires. Special problems with regard to heat buildup and wear are treated, and how these matters influence the choice of material and design for the stud jacket. The ability of the stud point to penetrate into ice of various hardness is considered.