Butterfly Trainer Bottle Opener plus flip-flop Balisong knife-style trainer tool. This is ideal for practicing your flipping safely and popping off bottle caps in the process. Imagine the look your friends will give you when they see you flip out this Butterfly Trainer Bottle Opener and pop open a beer, soda, or other beverage. It is 8.25 inches long when open and the stainless steel is heat treated along with having a satin bare naked metal finish. Specifications Overall Length: 8.25 Inches Opener Length: 3.375 Inches Opener Material: Heat Treated Stainless Steel Opener Thickness: 2.25mm Closed Length: 5.125 Inches Other Features: Flashy Training Tool, Identical to a Balisong Butterfly Handle: Heat Treated Stainless Steel, Hex-Head Hardware Lock or Securing Latch: Tail End Lock Finish: Satin Bare Naked Metal