If you like to work with machines tools and precision instruments, and have a keen eye for the perfect fit, you might consider being a millwright. Millwrights sometimes work to specifications requiring tolerances to a thousandth of an inch. In the old days, before heavy metal machinery, millwrights carved out gears and shafts from wood for mills and small industrial plants. Millwrights install conveyor systems, escalators, giant electrical turbines and generators. Millwrights install and do maintenance on machinery in factories and do much of the precision work in nuclear power plants. Millwrights are skilled construction mechanics who study and interpret blueprints and then put their knowledge and expertise to work drilling, welding, and bolting and doing whatever is necessary to assure that the cogs of industry are in perfect working order.