☆ Brand new, unused item! ★ Immediate purchase without comments is OK! ☆ We will ship via safe and secure anonymous delivery! ★ You can check the shipping status from the tracking number! Size: Approximately 174 x 59 x 25 (mm) 【Regularly Maintain Your Whetstone】 Whetstones must maintain a consistently flat surface to properly sharpen blades. Also, sharpening with a whetstone that is deeply gouged only in the center is very dangerous, as the blade edge can catch. Clogging due to dirt also causes a decrease in abrasive power. In addition to daily maintenance, such as rinsing with running water after using the whetstone, regular care is necessary. 【Causes of Whetstone Performance Degradation】 [Clogging] This is a state where cutting debris and the abrasive grains themselves are clogged between the abrasive grains. The blade itself slides on the abrasive grains, making it impossible to sharpen at all. [Grain Loss] This is a state where most of the abrasive grains on the surface have fallen off, and new abrasive grains are not appearing. Because the base material, such as the binder, is not worn away by the abrasive grains and cutting debris, the blade is essentially gliding over the base material. [Grain Blunting] This is a state where the abrasive grains on the surface are worn and no longer have sharp edges. Because the abrasive grains do not bite into the blade itself, the blade is moved back and forth on countless round abrasive grains, which can also degrade the blade itself. 【How to Use a Truing Stone】 Truing stones have large grooves. This shape is to prevent them from sticking when rubbed against the whetstone. Soak the truing stone and the whetstone to be maintained thoroughly in water. Place the grooved surface of the truing stone against the surface of the whetstone you want to flatten and rub back and forth. When the surface of the whetstone is flat, the maintenance is complete. Type: Kitchen knives/knives Material: Other Color: Black系