The Frikkie is a small, carry all the time, friction folder. A friction folder is held closed by the friction of the pivot and is held open by your hand using the tang extension. Many jurisdictions have crazy knife laws about blades that lock open etc. While a friction folder is a great handy little knife, the tang extension has mostly been useless till now. Brian changed the geometry to allow it to be used as a handy bottle opener! Now you can have a small knife that is easy to carry anywhere and the Carbon Fiber weighs in at less than an ounce! CARBON FIBER SPECS BLADE SIZE: 1 7/8" TOTAL SIZE: 4 1/8" BLADE THICKNESS: .085" BLADE MATERIAL: Stainless CPM-154 Steel - Stone Washed WEIGHT: 0.79 oz. COPPER SPECS BLADE SIZE: 1 7/8" TOTAL SIZE: 4 1/8" BLADE THICKNESS: .085" BLADE MATERIAL: Stainless CPM-154 Steel - Stone Washed WEIGHT: 1.9 oz. TITANIUM SPECS BLADE SIZE: 1 7/8 TOTAL SIZE: 4 1/8 BLADE THICKNESS: 0.085 BLADE MATERIAL: Stainless CPM-154 Steel - Stone Washed WEIGHT: 1.232 oz