heavy hand, with a
In a clumsy manner, as in You can't use that delicate equipment with a heavy hand. [Mid-1600s]
Overbearingly or severely, as in Children brought up with a heavy hand often rebel in later years. [Late 1800s]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.