VORNNEX Practice Butterfly Knife,Full Stainless Steel Unsharpened Blade 100% Safe Dull Butterfly Knife Trainer Butterfly Knife Comb for Training(Silver)

Size:Blade Length:4 Inch,Full Length:9 Inch.Convex nails to ensure smooth opening and closing, to extend the use lifecycle. Pure Copper Gaskets: anti-wear, good ductility, no rust FLIP WITH FUN: The trainer is so easy to use and safe flipping fun. we use enhanced 440 stainless steel and enhanced screws to make sure it can last long time.