Alter Aeon Online Help

Keywords are:  'thief skill explosives'

Skill: explosives               Lvl 29 Thie  (21%)
                                (helpful)   Requires: mechanical aptitude
                                Group: Thief tinkering
                                Profession

This skill allows thieves to build basic frag grenades. It also helps the
thief identify components that can be used in grenade recipes.

See also 'help build grenades' for more information.

If you also know the 'firearms proficiency' skill, you can build
cartridges.  See 'help build cartridges' for more information.