This nut cracker tool apply lever principle,which quite save your energy,even children could use it when under parents supervision. By adjusting screws on this nut cracker,you can adjust positions of it and no matter big or small nuts can be cracked easily.The handle is 9 inches to the pivot point. 8 inches from where it screws in. Walnut skin jump or disorder will not happened with this cracker tool,so to avoid damage.No matter children or elder people can use it securely.