More detail: 1. Made from CNC machined AL7075 & 1050 steel outer spocket 2. The 6-bolt design eliminates any chance of slippage 3. Precision machined and finished 4. Well balancing, lightweight 5. Tested and Proven 6. Accurate laser etched adjustable timing mark 7. Allow fine adjustments to cam timing with simple hand tools so you can maximize engine performance anywhere whether you're in the pits or in your own garage.