5 pounds isnt much.My Snap on clickers are old one I bought at least 30 years ago the other about 25.Been used more than almost anyones here as I used them daily at work.Had them checked a few times IE recalibrated by the factory.They were never really out.The beam style if like my old old Craftsman thats at least 40 years old will register a bit higher than my clickers.Rocky