Photon-knuckles are a type of Hardlight generating weapon developed by the Vaul for close quarters combat. The knuckles appear as a curved, triangular-shaped weapons while inactive (Stargate SG-1: Tollan sidearm). Once activated, they project a solid hexagonal barrier of photons (Ratchet & Clank - Secret Agent Clank: Holo-Knuckles; DC Comics: Power Ring; Mass Effect: Kinetic Barrier). When used offensively, the knuckles can increase the force of impacts by 400%. Even unarmored Terrans can used the knuckles to knockout or even kill a rampaging Ultralisk with proper training.