This knurling wheel is made of , which can withstand long-lasting use. Features the steel material, which has high durability, not easy to deform. Fine workmanship, ensures practicality. Features -Color:Dark Brown -Material:Steel -Size:2.50X2.50X0.15cm/0.98X0.98X0.06in -Size:2.50X2.50X0.18cm/0.98X0.98X0.07in Knurling pitch: 1.5mm .8mm - Material: made of high grade steel for durability. High strength and hardness. - Anti-rust, rigidity, abrasion resistance, strong anti-break strength, durable for lasting use. - High strength of teeth, acute cutting and high machining efficiency. - Double twill direction: one is positive, the other is negative, fit for your needs. - Excellent craft, carefully down to every detail to give it and beautiful look. Package list: 2 x 1.5mm knurling wheels 2 x 1.8mm knurling wheels