Two-Piece Hex and Twist Socket Set is Used for Installation and Removal of Normal, Damaged or Corroded Lug Nuts Found on Some Class 6 & 7 and Most Class 8 Trucks. The left-hand twist socket has a sharp edge which firmly bites into stripped nuts. 6-Point hex socket grips fastener without damaging or rounding. Sockets are impact rated and made from chrome moly steel. 3/4" Square drive.