Claw retraction

Claw retraction is the ability to be capable of retracting claws from one's body.

Also known as

 * Retractable claws

X-Men films

 * Wolverine possesses a pair of three, 12-inch retractable claws in each forearm that emerge between each of his fingers' knuckles. While they were originally made of dense bone like the rest of his skeletal structure, able to tear through most matter unharmed, they were surgically bonded with a near-indestructible metal adamantium, which also caused a noticeable side-effect of reshaping his rough claws into sleek blades. These metal claws allow him to cut through virtually any substance with little resistance.