This item is just for Practice usage. The blade has holes ， so it can't not be sharpened. This complies to ebay's weapons policy.All of the products we sell are brand new， safe， from smoke-free environment and high quality. This is a perfect one if you are a butterfly knives lover. You can practice without harmful. Right now， we provide much items for option. This one is one -- so beautiful! Cool! Thank you for looking . Any questions please email me. Length: 218 mm/8.58"Blade length: 100 mm/3.93"Blade thickness: 2 mmColour: As pictureHandle material: steel (+ polishing of titanium coating) Package Include: 1 x Practice BUTTERFLY Knife Comb NOTE:1.Please allow a little size error due to manual measurement.2.Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc， the color tone of the website's photo and the actual item could be slightly different. : 1 inch = 2.54cm or 1cm = 0.393 inch