Smith & Wesson Fourth Generation Black Ops Spring Assist Knives feature a machined aluminum handle, a drop point blade and the very popular MAGIC spring assist system. Flipped open with the ambidextrous thumb studs, this blade is ready for action. It locks into place with a liner lock and locks closed with a slide safety lock. Has a reversible tip up pocket clip and an extra large lanyard hole for alternate carry. A great EDC spring assist knife. This model, the SWBLOP4BS has a black finished combo edge blade. Knife Category: Spring Assist Knife Blade Style: Drop Point Action: Spring Assist, Side Open Blade Length: 3.3" Blade Material: 4034 Stainless Steel, Black Teflon Coat Open Length: 7.75" Closed Length: 4.4" Weight: 4.9 Ounces Handle Material: Aluminum Clip: Reversible Lock Mechanism: Liner Lock Safety: Slide Safety