The Gorilla GCT 4.5" dustless concrete crack chaser is a light weight alternative to crawling on your hands and knees which features excellent blade visibility and maneuverability for chasing cracks. A one piece handle design gives you a solid feel while operating, and the 2" dust port is excellent for attaching to a vacuum, powered by a 8.5A / 120V METABO W9-115 hand grinder which accepts a 4.5" blade that is up to 3/8" wide and can cut up to 3/4" deep.