JMP 1/2" Socket Insert Set, 3 Pieces. Durable thanks to the steel ring, which prevents the hexagonal profile from breaking at the tip. With plastic insert, additionally with plastic sleeves on the outside to protect the rims when tightening wheel nuts/bolts. Color-coded. Length: 85 mm. Contents: 1 each: SW 17, 19, 21 mm. Used for the following vehicles, among others: SW 21 for Japanese vehicles. PROFILE: HEXAGONAL DRIVE: 1/2 INCH FOR IMPACT GUNS: YES MAGNETIC: YES PIN TO RELEASE: NO INSULATED VDE: NO