This 3 " screw is used where the leads shield is buried and can't rerach it with the regular 1 and 1/2". The head is only 1/2" wide. If you want a wider head (sidewalk type) please call it in. It comes in package of 50 for $15
3 Inch Storm Panel Screw
Use number 3 phillips to install and remove. You will strip the head otherwise.