Piranha Knives Auto Rated-R OTF Automatic Folding Knife 3.5in 154CM Clip Point Blade Black Oxide Black Aluminum Handle. Aluminum handle. Pocket clip. Specifications for Piranha Knives Auto Rated-R OTF 3.5in Automatic Folding Knives: Manufacturer: Piranha Knives Blade Length: 3.5 in Blade Material: 154CM Stainless Steel Knife Application: Folding Blade Handle Material: Aluminum Opening Method: Automatic Closed Length: 4.63 in Package Contents: Piranha Knives Auto Rated-R OTF Folding Knife Piranha Knives P-19BKT: Auto Rated-R OTF Folding Knife 4.63in Closed 3.5in Black Oxide 154CM Clip Point Blade Black Aluminum Handle