Piranha Knives Auto 21 Automatic Folding Knife 3.375in CPM S30V Mirror Spear Point Blade Blue Aluminum Handle. 375in S30V steel blade making it an ideal everyday carry knife for those who demand precision and durability. Specifications for Piranha Knives Auto 21 3.375in Automatic Folding Knife: Manufacturer: Piranha Knives Blade Length: 3.375 in Blade Material: CPM-S30V Knife Application: Folding Blade Blade Shape: Spear Point Handle Material: Aluminum Lock Type: Button Lock Sheath Material: No Sheath Opening Method: Automatic Closed Length: 4.25 in Package Contents: Piranha Knives Auto 21 3.375in Automatic Folding Knife Piranha Knives P-21B: Auto 21 Automatic Folding Knife 3.375in CPM S30V Mirror Spear Point Blade Blue Aluminum Handle