It’s called a Tiger/Scissor Knife but is actual name is Katar or kattari. Is a type of short punching sword that is native to the Indian Subcontinent and popular elsewhere for swift and quick attacks.
It is notable for its horizontal hand grip, which results in the blade of the sword sitting above the user’s knuckles.
Typically, katars were used in close range hand-to-hand combat, which is effective in armour piercing. The blade was often folded or corrugated for additional strength.
Some knives have a mechanism responsible for making the blades split. The katar is a purely Hindu weapon and is never found outside of India.