Extrema Ratio BF4 Contractor Linerlock Folding Knife 4.75in Black Anodized Aluminum Handle N690 SS Partially Serrated Double Edge Dagger w/Black. 4.75" blade. Black anodized aluminum handle. Extended tang. Pocket clip. Bohler N690 stainless partially serrated double edge dagger blade with black Mil-C-13924 burnishing. Boxed. Package Contents: Extrema Ratio BF4 Contractor Linerlock Folding Knife Extrema Ratio 04.1000.0498/BLK: BF4 Contractor Linerlock Folding Knife 4.75in Blade Black Anodized Aluminum Handle Pocket Clip Bohler N690 SS Partially Serrated Double Edge Dagger Blade With Black Mil-C-13924 Burnishing Black