Drop-forged Chrome Vanadium steel spanners. Hardened and tempered with a fully polished, mirror finish. Open-end and WallDrive ring combination with long slim shaft. Supplied In EVA foam storage tray. SEALEY PREMIER One of a comprehensive range of Premier Hand Tools, suitable for daily professional use. CHROME VANADIUM STEEL Drop forged for increased durability and strength. LONG SLIM STYLE- For comfortable grip. HARDENED AND TEMPERED Fully polished mirror finish for corrosion resistance. OPEN-END WALLDRIVE RING Keeps knuckles clear of obstructions 21PC SET- Sizes: 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22 ,23, 24 ,27, 30, 32mm. SUPPLIED IN EVA FOAM TRAY For easy storage solutions. Tray Size (W x D x H) : 290 x 485 x 35mm.