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The Benchmade 5220S Auto Presidio Ultra knife features the Auto-AXIS lock system. The 5220S has a combo edge satin finish drop point blade built of 440C stainless steel. The hollow ground blade is perfect for a a multitude of applications. The lightweight folder delivers the strength and speed you need, exactly when you need it. The Auto Presidio Ultra has molded textured handles for a superior grip. SPECIFICATIONS: Blade Length: 3.47" Blade Thickness: 0.125" Handle Thickness: 0.640" Blade Material: 440C Stainless Steel Blade Hardness: 58-60HRC Blade Style: Drop-Point; AXIS Button Release with Auto Open Weight: 4.80oz. Pocket Clip: Reversible Tip-Up Lock Mechanism: Auto AXIS Pull Release With Integrated Safety Overall Length: 8.25" Closed Length: 4.87" Sheath Material: Sold Separately Class: Black