The Y-Hex Speed Wrench, 4/5/6MM by Topeak is a high-quality hex wrench made from chrome vanadium steel. It has excellent tensile strength, providing better wear resistance and a longer tool life. The wrench is designed for easy usage and provides excellent leverage. Its speed sleeve adds efficiency to your work. The wrench is colour-coded for easy identification, with separate 4, 5, and 6mm Allen wrenches. The bits are made from chrome vanadium steel, while the body is made from aluminum and engineering grade polymer. The wrench measures 13.8 x 12 x 1.7 cm and weighs 90g. It's a must-have tool for any bike enthusiast.