All our concrete cutter machines are built with a high-quality stainless bearing seat, which is much better than the cast bearing seat many companies are using. It can be a small hand-held cut-off concrete saw, a big walk-behind concrete cutter, or other styles, besides the gasoline, petrol engines; it can also be powered by diesel, hydraulic or pneumatic pressure, or electric motors. The cutter blades used on concrete cutters are often diamond cutter blades to cut concrete, asphalt, stone, etc.