chisel Material is 45# carbon steel or railway steel. We can produce different size,suah as dia is 14mm,16mm,18mm.... chiselMaterial is 45# carbon steel or railway steel.We can produce different size,suah as dia is 14mm,16mm,18mm...and length is 200mm,250mm,300mm...We can produce any type according to your require. chisel with Gum cover