Professional Quality, sockets manufactured from chrome vanadium steel hardened, tempered and chrome plated for corrosion protection. Chamfered end allows positive nut location and entry. Hole for driving accessory spring-loaded ball. Sold loose. Manufactured to DIN 3124/ISO 2725 and DIN 3120/ISO 1174 Specifications. Type: Bi-hexagon socket. Material: Chrome Vanadium Steel. Size: 3/16in. Dimensions: 3.80cm x 2.10cm x 2.10cm. Weight: 0.06kg.