The Wolf Tooth Ultralight Hex and Bottom Bracket Wrench is lightweight, durable and primed for travelling with your bike. An external BB cup spline at one end is ideal for centerlock rotors as well as bottom brackets. The 1" hex end pairs seamlessly with Wolf Tooth's steel hex insert tools – sold separately – and this tool has a nifty chainline measurement ruler.   Features Machined from 7075-T6 aluminium in Minneapolis, USA.. Includes the wrench only. Steel inserts are not included but can be purchased separately or as a set.. 1-inch hex drive interface compatible – inset magnets enable quick coupling and decoupling of steel inserts.. 16-notch 44 mm bottom bracket tool (or centerlock rotor tool) compatible. Weight: 88g.