CRKT Knife Maintenance Tool
CRKT keeps your folding knives acting sharp and your keychain looking sharp with their new Knife Maintenance Tool. The EDC tool for your EDC tools contains both a tungsten carbide field sharpener and ceramic honing edge, plus a pair of T6 and T8 Torx bits.
Mechanical engineer Tom Stokes designed the Knife Maintenance Tool for CRKT and, knowing you have precious little space for another doohickey on your keychain, threw in a bottle opener and flathead screwdriver so you can sub it in for your existing multi-tool.
According to CRKT, the Knife Maintenance Tool's field sharpener and honing edge "are compatible with nearly every folding knife in existence."