Park Tool AWS-1 Y-Hex WrenchPark's AWS-1 Allen wrench features a unique Y shape for maximum torque and unsurpassed comfort. 4, 5 and 6mm heads prove useful in almost every repair situation.
For at-home repairs & adjustments, this 4,5 & 6mm Y wrench is my go-to tool. It's comfortable in my hand, and can fit onto almost every screw on my bike. It's a very good value on Price Point, too!