Instead of a sledge hammer I use my Mossberg 12 shotgun!!I used to have a misbehaving Sony digital clock radio--was peices after one shot of 3" magnun 00 buckshot.Had a noisey flap card clock radio-it succumbed to a Brennake slug-cards all over everywhere!FELT BETTER after!!!A sledge-have tried it--satisfying,too when you can't use the shotgun!30-06 Vs Fisher VCR you can imagine who won!That VCR was a HORRIBLE machine-ate and mistracked tapes!!!