Made of heat treated chrome molybdenum steel. Pliers have .038" (1.0mm) diameter tips. Overall length: 3". Handle length: 2" Small sized pliers for work in tight areas. Service S-ring and R-ring clips, internal, straight, or angled. this set includes two internal snap ring pliers (one straight and one 45 degree) and two external snap ring pliers (one straight and one 45 degree).