Chrome Vanadium steel combination spanners. Hardened and tempered with a fully polished mirror finish for corrosion resistance. Open-end and 12-point WallDrive(r) ring combination. Supplied in an EVA foam storage tray. HARDENED AND TEMPERED CHROME VANADIUM STEEL - For strength and durability. FULLY POLISHED MIRROR FINISH For corrosion resistance. COLOUR CODED For easy size identification. 12-POINT WALLDRIVE(r) RING Grips the flats of the fixings and not the fasteners, allowing up to 30% more torque to be applied to the fixing. 12PC SET Contents: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19mm. SUPPLIED IN EVA FOAM STORAGE TRAY For easy storage solutions. Tray size (W x D x H): 185 x 275 x 25mm. LIFETIME GUARANTEE*.