The welded steel frame and 2-piece powder-coated handle are durable and reliable. Molded plastic pad cover with wraparound bumper. Thumb-operated safety switch. Comfortable vinyl grips. Negative pressure on/off switch. Dual steel operating triggers. Multiple position handle adjustment. Non-marking 1" x 5" non-marking ball bearing wheels. Includes harpoon style flexible pad driver with spring-style pad centering clamp.