The only reason I give it 3 stars is because it comes predrilled and the holes do not line up for my application, I had to drill new holes and widen some that were 1/16 - 1/8 off center. These bus bars would be much better sent un-drilled as each installation Im sure is different. Surely the manufacturer would save money by not drilling them up. they are soft and easily drilled where needed. Otherwise it worked great, did not need longer screws unless you were adding wire ferules in addition to the bar.