1、PRECISE ANGLES: With the help of powerful magnets, the blade can be held in place at a fixed angle of 15° or 20°, ensuring an even angle across the entire blade, no matter how big or small. 2、EASY ROLLING: The Rolling knife sharpening system combines interchangeable sharpening discs and magnetic angle supports with a rolling mechanism that makes the process simple and intuitive for immediate results. 3、15° AND 20°: 15° is ideal for fine cutting jobs such as sushi, sashimi, damascus knives, especially with hardened steel with high carbon content.20° is perfect for rugged cutting tasks in the kitchen and elsewhere. 4、ADAMAS CERAMIC: The hob sharpeners come with adamas and ceramic sharpening discs respectively. Industrial adamas is the most durable and effective abrasive. 5、SIMPLE OPERATION: Remove the first layer of the blade with adamas abrasive, then just polish it with a ceramic disk. Item Type: Rolling Knife Sharpener Kit Material: Adamas Weight: Approx. 511g / 18.0oz Cylindrical Sharpener: Approx. 9.3 x 5.5 x 5.5cm / 3.66 x 2.17 x 2.17in Square Auxiliary: Approx. 10 x 6 x 4cm / 3.94 x 2.36 x 1.57in 1 x Rolling Knife Sharpener 1 x Square Auxiliary