CONBEE 9.13" Blunt Practice Metal Balisong Butterfly Trainer Knife Stainless Steel Training Dull Kit Dragon Sheath This item is just for Practice usage.Practice butterfly knife training tool Blade material: 5Cr13MoV Blade (dull) Length: 9.8cm(3.85").Thickness: 0.3cm(0.11").Width: 1.8cm(0.70") Hardness: 56HRC.The handle is made of die-cast zinc steel, integrated molding Length (when opened): 23.2cm(9.13")