The Cat Claws are a pair of black furred gloves sporting a full-length katana blade at the end of each finger. This is a reminiscence of overly long cat claws. When not in use, they are typically kept inside a duffel bag.
Due to the length and sharpness of the blades, one swing can inflict multiple aggravating wounds and cut through walls and rocks. However, they may not be durable enough, as Luffy managed to snap the right claw. As a reference to remembering how to kill, Kuro pushes his glasses up with his palm, in order not to scratch his face with his claws.
Kuro primarily uses these giant claws in conjuncture with his superhuman speed to strike his opponents with such swiftness that they will not know what struck them until it is too late; he can reportedly kill 50 highly skilled assassins before they notice his presence.
Though Kuro's raw speed is roughly the same as that of CP9's Soru technique—and long claws makes him a deadly fighter, his weakness lies in his inability to see clearly while running, causing him to strike anything his claws randomly connect with, whether it be an enemy, the surroundings, or his subordinates.
- Shakushi (杓死 Shakushi?, literally meaning "Scoop Death"): Kuro's ultimate technique. A fearsome attack that utilizes Kuro's Nuki Ashi to the fullest, moving at a speed of 100 meters in 4–5 seconds, allowing him to sweep a large area, killing anything his claws connect with at random, including his own crew. He initiates this move by swaying back and forth sideways in a fluid manner—this is necessary in order to enter the "trance" needed to perform the move. The order in which he inflicts his attacks are so random that they range from mediocre scratches to fatal evisceration to both friend and foe alike. He moves so fast even he does not know what he's attacking, and only stops when tired out (or when someone can catch and physically stop him, as Luffy did). In the anime this move has the side-effect of generating purple clouds of smoke to rise from the ground as Kuro moves at his topmost speed. It is said that he killed many of his own crewmates in the past with this technique. In Unlimited Cruise, Kuro uses this attack to focusing onto his opponent with multiple strikes, rather than a widespread carnage. In the 4Kids dub this attack is called Cat Out of the Bag Attack, and in the FUNimation dub and Viz manga, it is simply called "Out of The Bag Attack", referring to the phrase "Cat's out of the bag".
- The name of this attack comes from the Japanese phrase "neko mo shakushi mo" (猫もしゃくしも neko mo shakushi mo?, literally meaning "even cats and rice ladles"), which is a Japanese figure of speech, meant to mean "absolutely everything", reflected in the fact that this attack indeed attacks "absolutely everything". The word "Shakushi" is homonym with "Rice Ladle". It's also a pun of the Japanese word, Sakushi which means schemer, hence Kuro's personality.
- These weapons are possibly based on the real life weapons, the tekagi-shuko and neko-te.
- The Nyaban Brothers fight with similar gloves to that of their captain, albeit much shorter, and are simply long nails as opposed to katana blades.
- One Piece Manga and Anime — Vol. 4 Chapter 28 (p. 9) and Episode 12, Kuro implicitly uses the Cat Claws to injure Merry.
- One Piece Yellow: Grand Elements , The Cat Claws are named and briefly explained.
- One Piece Manga and Anime — Vol. 4 Chapter 33 (p. 6-8) and Episode 14, Kuro properly shows the Cat Claws against the Nyanban Brothers, and Jango explains Kuro's speed.
- One Piece Manga and Anime — Vol. 5 Chapter 38 (p. 16-20) and Episode 16, Kuro releases the Shakushi against Luffy and his crew, causing deep scratches all over.
- One Piece Manga and Anime — Vol. 5 Chapter 37 (p. 18-19) and Episode 16, Kuro stabs through a boulder Luffy picked up as a shield, and the claws snapped when Luffy bent them.
- SBS One Piece Manga — Vol. 42, Fan question: "Which is faster, Kuro's Shakushi or CP9's Soru?"