Crank Brothers Y12 Multi Tool. Crank Brothers works its tool maestro magic on the classic Y wrench design and the result is their nifty Y12 Multi Tool. The Y12 tool consists of two Y wrenches that neatly fasten together via magnets for storage purposes. One Y wrench features a trio of hex keys 4mm, 5mm, and 6mm while the other Y wrench has two hex keys 3mm and 8mm plus a driver. Peak inside one of the three storage boxes and there are a pair of hex bits 2mm, 2.5mm a pair of Torx bits T25, T10 and a pair of screwdriver bits Phillips and flat that snap into the driver for use. The second storage box houses a patch kit while the third storage box is empty and ready to stow small personal items. Just slip the Y12 inside a Cycling Jersey pocket or seat bag and you'll be ready and able to solve a myriad of road sidetrail side repairs.