The Kota Japan 12 In. Diamond Carbon Steel Professional Knife Sharpener Rod is a high-quality kitchen tool designed by Grade-A Global, LLC. Featuring a silver color and ultra fine grit type, this sharpener rod is made of durable carbon steel for optimal performance. Weighing 191 grams, it is a reliable and efficient product for maintaining the sharpness of your kitchen knives. Ideal for professional chefs and home cooks alike, this knife sharpener rod from Kota Japan offers precision and ease of use for keeping your knives in top condition.