The GCT-4.5 has several key features that make it a must have tool for chasing cracks. By getting the operator off their hands and knees, it increases safety and productivity at the same time. The swiveling rear casters allow the blade to follow the tightest cracks easily. The large 2 inch dust port makes the GCT-4.5 virtually dustless. The ¼ inch thick steel frame helps hold the tool on the ground while ensuring it will last for many years to come.