Highlights:1.Made of food grade ABS plastic with built-in 304 stainless steel spring, it is durable, easy to clean and does not rust.2.Size: 9.9 x 6.6 x 3 cm, does not take up storage space. Knife not included.3.Press two button of slicer to clamp knife blade at same layer. Move the blade horizontally at flat surface.You can get perfect uniform cake or toast slice4.Spring inside and adjusted: Embedded stainless steel spring clamp the blade without any loose or fall off, the DIY cake slicer total 5 layers can be adjusted.5.Perfect for layer cakes, create perfect layers, cake horizontally slice. Suitable for cake size 10 inch and below which depends on the blade length of knife.Details:Material:Plastic and stainless springSingle size:2.3 " * 2.3 "* 1.2 "for each one; With box Size: 3.9" * 2.6"* 1.2 "How to use:1.Grip both ends of the serrated bread/cake knife by each of the units at the same level/layer.2.Place the cake/bread and units on an even flat smooth surface.3.Take hold of each unit on both sides and smoothly cut through the cake in a back-and-forth motion (do it nice & slow)4.This should result in a uniform even slice/layer.5.The units can be easily cleaned in warm soapy water/rinse in cold water and air dry.