Clicker Handles and BladesThe Clicker Knife handle can hold either straight or curved blades. These blades are disposable, but from our own experience in our Warehouse, where they are used by us on a frequent basis, they stay sharp for a long time. Incidentally, they can also be re sharpened. This product can only be sold to customers that are 18 years of age or older. By adding this item to your basket you confirm you are 18 years or over. Further information can be found here