Xcellent Global Professional Knife Sharpening Knife Sharpener System Mini Portable Kitchen Kit for Ceramic/Steel with Safety Large Suction Pad, Blue HG096L Material: ABS; Ceramic & Diamond, the width of brothers mouth is 4 mm, package size: 12.5x 7x 5 cm, weight: 105g Safe and stable to use. A large safety suction ensure to grip on the glass, marble or similar smooth surface steady, allow one hand to operate it Small and compact. Just keep it in the utensils drawer or at the corner of your counter when not use. Pretty portable and easy to carry in your bag Easy and convenient operation. No more slaving away forever using hand-held stones. Get amazing results in seconds. Mini and cute, ideal for kitchen knives, household knives and fruit knives use