Well i have two double roller chains, one has the 9 keyway to degree your cam which provides full control of cam setup i could have sworn it was a ta performance double roller but i dont remember bought it along time ago on here but just noticed this one doesn't say rollmaster on gear? The links do say rolon though...The other double roller is a std double roller, which was in a GN i bought and had a club cam which i believe was a 212 lunati.. not sure if the timing chain set was lunati can anyone tell the brand? Want to sell both timing sets but dont want to make up any information need an accurate description can anyone help on identifying the chain sets any information would helpful thanks,