Features:  The observe side is for holding sharpening stone while the reverse side is to skid resistantly touching the table.  The whetstone base is suitable for holding all kinds of grindstone ranging from 125-230mm.  The whetstone base is suitable for installed on sink ranging from 310-400mm.  The whetstone base is multifunctional, high strength, fine hardness and practical in use. Nice assistant tool in the kitchen.  The whetstone base is made of fine quality plastics, lightweight, practical and convenient, suitable for sharpening various kinds of cutters in home kitchen or canteen.  This product is suitable for sharpening of household kitchen cutters, sharpening of woodworking cutting tools and so on.    Specifications:  Color: blue, green (optional)  Material: plastics  Suitable grindstone size: 125-230mm  Suitable sink size: 310-400mm  Item size: 360 * 74 * 25mm / 14.2 * 2.9 * 1.0in  Item weight: 300g / 10.6ounce  Package size: 370 * 80 * 30mm / 14.6 * 3.1 * 1.2in  Package weight: 330g / 11.6ounce    Packing List:  1 * Grindstone Holder