The Atwood FunnyBone pocket wrench features 16 tools in one handy and compact 3 1/2" OAL piece. Made of beefy 5/32" thick S30V steel these have a stonewashed finish. Wrench sizes include SAE 1/4, 5/16, 3/8, 7/16, 1/2, 9/16 and 5/8". Metric sizes include 6, 8, 10, 12, 14, 16 and 18mm. A bottle opener and additional 5/16" wrench complete this handy little keychain package. I'm tying the lanyard through the metric end but metric users can switch it to the SAE side for quick and easy differentiation.