RT Off-Road's Trail Tool is the best way of keeping the 3 most important size hex sizes within arms reach at all times. The matte black powder coated tool features 3 hex sizes: 1/2" (13mm), 5/16" (8mm), & 1/4" (6mm). This allows fasteners that are serviced regularly (door hinge nuts, battery terminals, hard top bolts, etc.) can be removed with a single tool on a keychain.