... DIY grades of blade available,both with Reliable Quality and Ideal for Normal and Industry. Sepecifications:4" x 24T, 30T, 40T5" ... -91) Carbide Tipped, well Cemented, Body Heat-treatment, Surface Polishing and Tips Grinding, Balancing2) High Quality DIY: with K10 or K01(HRA92 ... -93) Carbide Tipped, well Cemented, Body Heat-treatment, Precise Surface and Tips Grinding, Balancing TCT Circular Saw blade