NEBO SmartKnife Multi-Purpose Tool that can be used as a Bottle Opener, Screwdriver, Belt Cutter, Glass Breaker and Knife Fantastic knife and multi-purpose tool perfect for any outdoor enthusiast Smart knife with bolt heads 4mm - 12mm, lock knife, 55mm Cutting Edge Knife, Adjustable Spanner (4mm-10mm bolts) Designed with a fine Sandblasted 420 Grade Stainless Steel Blade Measures 3.54x1.3x0.35 in.; 0.08lbs.