3 PACK17mm 19mm 21mm DEEP Impact Socket Set1/2" Square Drive6 PointManufactured from Chrome Vanadium steel, hardened, tempered and with a phosphate finish for added corrosion resistance. Deep 6-point WallDrive sockets allows a transfer of up to 30% more torque to the fixing. Supplied in storage caseFeatures: Manufactured from Chrome Vanadium steel, hardened, tempered and with a phosphate finish for added corrosion resistance. Deep 6-point WallDrive sockets allows a transfer of up to 30% more torque to the fixing. Sizes: 17, 19, 21mm. Supplied in storage case. Lifetime guarantee . Specification: Drive -1/2"Sq Net Weight -0.76kg Sizes -17, 19, 21mm Further Information We sell a wide variety of tools and workshop equipment for both the DIY and Professional markets. Alias: ys09853 Loops 3 PACK - 17mm 19mm 21mm DEEP Impact Socket Set - 1/2" Square Drive - 6 Point