CNC Squid Triton Model Non-Sharp Professional Trainer

(Swimming): In swimming, the "butterfly" is a specific stroke. A butterfly trainer, in this case, could be a coach or a person who teaches swimmers how to properly perform the butterfly stroke. This involves training swimmers on the key techniques, such as timing, body position, arm movements, and the dolphin kick that characterizes the stroke.

comes with extra ballbearing if in case you loss it .

also known balisong 

Specifications:

Overall Length: 10 Inches
Blade Length: 4.5 Inches
Closed Length: 6 Inches
Blade Material: 420B CNC Blade, Heat Treated Blue Finish
Blade Thickness: 3.5mm
Blade Style: Tanto Blade
Sharpness & Functionality: Not Sharp, Functional Flip-Flop Knife
Blade Features: Tanto Point, CNC Squid Cut out Blade
Handles: Purple Channel, Hard Surface CNC Aluminum Finish
Other Features: Non-Sharp Trainer Balisong Butterfly, Used for Training Only