I think it varies with each company. i am not sure if they are all made the same. I know my Hudy CVD's have replaceable pins, but without the Hudy tool ($100) they are really difficult to change. I would see if your manual has part numbers for the pins only. If it does that means they are replaceable, if not, you may need to buy all new CVD's Some companies would do that on purpose so you need to buy a $20 part instead of $5 worth of new pins