Lezyne stainless tools are functional lightweight and durable tools ideal for roadside or trail side use the forged aluminum side plates are lightweight and easy to use while wearing gloves the stain less steel bits and fastening hardware are extremely durable and corrosion resistant forged center pivot bits increase tool rigidity and improve ergonomics a cast steel chain breaker works with 91011 speed chains 40stl 12 and 2041 and has 3 integrated spoke wrenchesweight115gdimension