Laser Etched Timing Marks For Precise Tuning. CNC Machined For Exact Fitment. Machined From High Grade 6061 T6 Billet Aluminum. Lightweight Design. Aluminum Finish. Outer Gear Teeth Hard Anodized and Beveled For Longer Belt Life. Precision Adjustable with 12 Degrees Of Both Advance And Retard. Allows Cam Timing To Be Adjusted For More Horsepower And Torque. Stainless Hardware Allows Easy Adjustment And Secure Lockdown.