Zeta Rear Axle Block Husqvarna FC/TC '16- BlueZeta Rear Axle Blocks are designed for strength, precision, and easy adjustmentmaking chain alignment quicker and more accurate whether you're in the workshop or at the track. Features: CNC machined axle blocks with a durable anodised finish. Made from high strength A6061 T6 aluminium. Precision machining across all surfaces, including adjustment scales. Clear side scales for quick, accurate alignment without guesswork. Front and rear offset design