It was clear that the designers at Ares Macrotechnology had been comic book readers, or had parents who were. After all, cybernetic spurs resemble nothing so much as Wolverine’s Claws.
Mounted in between the finger bones and braced against the bones and musculature of the wrists and forearm, cybernetic spurs are four inch steel blades that rest retracted within the hand and forearm. When extended they protrude through synthskin apertures between each knucklebone, three to a hand.
The blades come in numerous forms: titanium alloy spikes for puncturing, smooth razor-edged blades, even thick serrated knives. Some people mod them to have poisonous coating vacuoles at the tip of the synthskin sheath—though such things are not recommended by any major company.
Depending on the wrist and arm strength of the user, they can be as deadly as a sword. And the spring-loaded release hits with such force as to puncture three inches of solid oak, or bone.
Spurs are controlled by a synthetic nerve ending in the forearm linked to the motor cortex of the brain. Users describe the sensation as similar to tensing a muscle in the forearm.
The slightly magnetic components in the machinery make it susceptible to some powerful magnetics. Parts of the machinery can be disabled by an emp pulse and powerful electrical surges can make the synthetic nerves go haywire. This last liability is often exploited in a gruesome tactic known as spur-fragging, where people use a well timed electric pulse to force a user to impale himself or a friend.
When retracted, the highest end spurs are completely invisible. Low end implants usually give away their location with cheap, mismatched synthskin, or even small metal rivets used to hold the scaffolding in place.
Because of the presence of the blades within the arm, traumatic blows can dislodge the machinery and cause internal bleeding. Infection is a risk, but it should only be a problem with the cheapest implants.