TheWolf Tooth Pack Wrench Steel Hex Inserts 16mmwere designed to be paired with thePack Wrench Ultralight 1 Inch Hex and Bottom Bracket Wrench.The aluminum wrench (sold separately) has magnets that hold the inserts securely in place. Made in the USA and CNC machined from hardened steel with electroless nickel plating.Inserts are each sold separately. If you travel a lot with your bikes and are always looking for the leanest way to have everything you need to build or service a bike without packing 50 lbs of tools, these tools are for you. To help with thisWolf Toothdeveloped some very specific Pack Tools that are high quality but weight conscious for those that do mobile maintenance, travel with their bike, or just want one set of tools that can be thrown in when heading off to the trail ... More info