This edger blade is very balanced showing no vibration or wobble at all. The grass edge is cut precisely with no straggler runners in my St. Augustine grass. I bought (2) and they lasted two full spring, summer, and fall seasons weekly used. Also, I have a corner lot with sidewalks, so I'm edging three full-lengths of my property in addition to the back yard and around the flower beds. I am rough on these blades while using them on a 6HP John Deere Kawasaki Commercial Edger and they can take severe abuse. Don't be scared, buy these blades, and admire your grass edging.