MotoMaster Halo Series Motorcycle Brake Disc. 1x MotoMaster Halo Series Brake Disc. All Moto Master Discs are TUV approved, ensuring the highest standards of safety, quality, and reliability. The laser-cut and precision-ground outer ring is securely mounted to a billet CNC-machined aircraft-grade aluminium carrier, finished with a black anodized and laser-marked design for strength and style.