CR-VPH2 refers to a tool that is made from chrome vanadium. Abbreviation of CR-V on tools makes referrence to that "Chrome Vanadium which is used for many different types of tools because when heat-treated it has excellent properties such as strength, toughness, and resistance to wear and fatigue" and you are correct that PH2 refers to Phillips Head size number 2. Good Luck with your project and I know that your project will work out much better for you since you gained this knowledge ;-)