Wheel twist socket set designed for unfastening damaged nuts and bolts, and especially for locking wheel nuts.The special spiral profile on the inside enables the socket to grip sufficiently for loosening in cases where standard sockets and wrenches fail.Drive: 1/2".Black phosphate finish.High performance alloy steel.Hardness: 45-48 HRC.Not suitable for machine operation.Includes 5 different sockets: 17, 19, 21, 22 and 24 mm and a punch.Also available individually