Kelvin Keirle, 63, of Waterworks Road, Portsmouth, was convicted of assault occasioning actual bodily harm on June 8 at the Co-op in Havant Road, Portsmouth.
Magistrates imposed a 26-week prison sentence suspended for a year.
He must pay Â£300 compensation to the victim in the case for the assault.
Keirle must also pay aÂ Â£115 victim surcharge, plus Â£320 costs to the Crown Prosecution Service.
The screwdrivers must be forfeited and destroyed.