Elora Bi Hexagon Socket, 3/4" Sq. Dr., 19mm

Amazon

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 with locking pin Size: 19mm 3/4" square drive socket Professional Quality, Weight: 0.3968320716 Pounds, Manufacturer: Draper

Electrical World

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 with locking pin. Some socket sizes have knurled band for extra hand grip. Sold loose.