Thanks to the high quality materials, the egg opener is durable, sturdy, rust-resistant, easy to store and easy to use, making it a practical and perfect kitchen tool. By pulling up the plunger and letting go for 2-3 times after positioning the topper on the egg, you are basically just "tapping" the cracker onto the egg and scoring the shell. It is constructed of stainless steel material. The diameter of the product is 3.7cm. The total height of the product is 12.8cm. This egg cracker is ideal for soft and hard boiled eggs or rawed eggs. Item Name: Egg Shell Opener Material: Stainless Steel Features: Built-in Spring, Non-slip Handle, Labor-saving Size Details: Diameter: 3.7cm/1.46"(Approx.) Height: 12.8cm/5.04"(Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Egg Shell Opener