Spy SCS Fork The Spy SCS fork, like all Sacrifice products are manufactured to the highest standards. Forged from aircraft grade aluminium gives extra strength and then carefully CNC machined to add the finest detail. The Spy fork is very unique using a 4 Step telescopic shaft, built in M6 thread, with integrated crown race, nut trap design for one tool assembly, built in spacers, M8 high tensile axle, laser etched logo details, The Spy forks we keep up the reputation of Sacrifice being a premium brand and a front running for design and technology.