Today I hit an AP2 demo 6 iron, and I want to look into buying a set CB's. I just need to know the specs of the iron I hit today and if there is any changes because of going from the AP2 to the CB. What i know from the club was that it was a stiff shaft X300 and +1/2" on them. Which is needed. The only thing I need to know is what the numbers on the back side of the hosel meant, it was a +2 over a horizontal line and below the line was STD. Would be a great help if I could get the right specs for these irons

Note: I did hit the AP2 off of a strike board five times and each time the tape was contacted in the middle.