Engineered with fewer parts and less hardware mounted on a heavy-duty seven - gauge steel deck, the PR power rake is designed to reduce noise, vibration and maintenance. To further increase product performance, the PR power rake utilizes flail knives which are heat treated and tempered to resist breakage, and greasable pillow block bearings for added durability. A top-quality, professional - grade height control for positive engagement and fine-tuned performance is standard.