440C High Carbon Stainless Steel Main Blade and AUS 8 Secondary Blades; High Glass Reinforced Nylon Handle Scales; 420J Stainless Steel Liners; Springless Lockback Main Blade, Slip-Joint Secondary Blades; Large and Small Utility Blades and Screwdriver / Can Opener Blade. Measures 6.25" Open and 3.75" Closed.