Wolf Tooth EnCase System Hex Bit Wrench Multi Tool. Make simple trailside or roadside repairs with this multi-tool that has 14 functions. An 8mm hex head has a 4mm insert to fit each of the eight attached hex bits. With its slim design this multi-tool can be stowed inside an EnCase System Storage Sleeve to be carried in handlebar ends as it was designed or a mainstay on any home workbench.