KKmoon Upgraded Version Fixed-angle Knife Sharpener Kits WIth 4 Sharpening Stones For Kitchen Knife With a sucker, can be fixed on smooth and flat surfaces stably. (If you put some water on the bottom of the sucker, it will have stronger adsorption capacity.) Universal base ball design, you can adjust it as you like for comfortable position to operate. With specially designed angle indication mark on adjustable pivot rod, you can adjust its angle according to the angle of knife blades. Dedicated knife sharpening kits come with four high-quality sharpening stones, 120#, 320#, 600#, 1500#, meeting your different needs. A sliding piece can be adjusted to fit different knives.Made of stainless steel (including screws), ABS engineering plastic, durable to use.