1.Through the ISO9001:2008 certification. 2.Produce saw blade for ten years. 3.Saftely and reliably. 1.Sintered saw blade designed for hand held circular saws and most angle grinders.2.Provide fast,free, smooth cutting in tile,brick blocks, concrete ,marble,soft granite, stone and many other materials.3. The effect is better if cutting with water Diamond Tools Circular Saw Blades Plunge Saw