This asphalt blades are laser welded by German laser welding production line, by which achieve good welding strength. In this case, segments won't break during the cutting project. Due to abrasive properties of asphalt, there're protective segments with the Asphalt blade, aiming to protect steel core. Diameters of this laser welded concrete bladeare ranging from 300mm to 600mm, which are used on handheld power saw, floor saw, walk-behind saw. It's used for cutting asphalt-concrete, asphalt and other abrasive materials with excellent performance. Other specificatons are based on your request.