Professional Bundle: Your professional sharpening kit is made of premium white corundum and is composed of a double-sided sharpening stone. Multi-purpose: Your sharpening kit comes with a special free fix stone, a double-sided whetstone, a silicone pad, a non-slip bamboo base, and an angle guide. Our sharpening stone kit is incredibly user-friendly and simple to put together. Since a whetstone uses water to sharpen, there is no need for pricy honing or sharpening oils, and there is no mess while sharpening. It is also simple to clean up after usage of water. PROFESSIONAL QUALITY AND CUSTOMER SERVICE: We will replace this whetstone for you right away if there is ever an issue with it during use! Please feel free to contact our customer service agent if you have any questions concerning the sharpening stone. The Bamboo non-slip silicone base holds the stone in place when sharpening, which helps to prevent the stone from sliding