The Benchmade Auto Immunity is a premium compact automatic knife built for high performance, legal compliance, and everyday practicality, combining CPM‑M4 steel, robust ergonomics, and Benchmade’s proven Auto‑AXIS mechanism.

• Overall Length: 5.95
• Blade Length: 2.49
• Cutting Edge: 2.34
• Blade Width: 0.90
• Blade Thickness: 0.09
• Blade Material: CPM M4
• Hardness: 62-64 HRC
• Blade Style: Wharncliffe
• Blade Grind: Flat
• Finish: Black
• Edge Type: Plain
• Handle Length: 3.46"
• Handle Width: 1.00"
• Handle Thickness: 0.48"
• Handle Material: Aluminum
• Color: Green
• Frame/Liner: Steel
• Weight: 2.29oz.
• User: Right Hand, Left Hand
• Frame/Liner: Steel
• Pocket Clip: Tip-Up
• Weight: 2.29
• Knife Type: Manual
• Opener: Axis
• Pivot Type: Washers
• Lock Type: Crossbar Lock
• Knife Type: Auto
• Model: Immunity
• Model Number: 290BK-2
• Country of Origin: USA
• Brand: Benchmade
• Best Use: Everyday Carry, Tactical
• Product Type: Knife
• Best Use: Everyday Carry, Tactical