【Dual-Surface Sharpening】One end features a 400-grit diamond surface for effective sharpening, while the other end has a smooth ceramic surface for polishing, ensuring optimal blade maintenance. 【Multi-Angle Knife Guide】Our knife guide offers 4 angles to meet various needs. 12 degree and 15 degree angles ensure razor-sharp edges, ideal for sushi knives and high-carbon steel blades. 20 degree and 25 degree angles provide durable edges suitable for heavy-duty kitchen cutting tasks. 【Effortless Sharpening Experience】Compared to traditional whetstones, our rolling sharpener offers a more comfortable and enjoyable sharpening experience, perfectly blending functionality with exquisite craftsmanship. 【Magnetic Attachment】The sharpener can magnetically adhere to the knife blade, ensuring stable positioning and operation during the sharpening process. 【Ergonomic Design】Features an ergonomic, non-slip handle design for comfortable and secure grip during use, enhancing safety and control. 【Versatile Compatibility】Suitable for various kitchen knives (such as chef's knives, santoku knives, utility knives), without brand or model restrictions, offering excellent versatility. Specifications: Material: Beechwood handle + Tungsten steel sharpening surface Dimensions: Circular part: approximately 5.5 x 8.4 cm; Square part: approximately 9 x 8.4 x 2.5 cm Sharpening Angles: 12 degree, 15 degree, 20 degree, and 25 degree Sharpening Surface: 400-grit diamond surface on one end, smooth ceramic surface on the other