The Torque Tools Allen Y Wrench 4/5/6mm Bike Multi Tool is a compact and versatile tool for cyclists. It features a Y-shape design with 4mm, 5mm, and 6mm hex wrenches for adjusting various components on a bike. The wrenches are made of durable and corrosion-resistant chrome vanadium steel, and the tool has a comfortable grip for ease of use. The compact size of the tool makes it easy to carry in a bike bag or pocket.