Having a man's hands around really does widen the range of what you can do.
Literal
After-all man's-hands [subject-が] exist-[conditional-と], work [possessive-の] range [subject-が] widens [casual-ねぇ].
男手 ('a man's hands, male help') is a compound for the kind of physical labor strength traditionally associated with men. やっぱり ('after all, as expected') confirms a known truth. 作業の幅が広がる ('the range of tasks widens') is a clean metaphorical expression. The drawn-out ねぇ adds warm, reflective agreement.