Dagger, Swordbreaker

You can use this dagger to disarm or sunder enemy blades by catching them in the grooves on the back of the blade and using your weapon as a lever.

Source: Pathfinder d20pfsrd.com

Benefit: If you are proficient with this weapon, add +4 on your disarm or sunder attempts against bladed weapons.

Weapon Feature(s): disarm, sunder

Light Melee Weapons (Exotic)
Weapon	Cost	Damage (S)	Damage (M)	Critical	Range Increment	Weight	Type	Special
Dagger, swordbreaker	10 gp	1d3	1d4	x2	—	3 lbs.	S	disarm, sunder

Source Advanced Player’s Guide