You are allowed to carry up to 14 clubs for play (but you can have fewer). There is no restriction on the type of clubs you carry – for instance you can carry multiple putters, multiple drivers, or some left-handed clubs and some right-handed. If you start a round with 14 clubs, you are generally limited to those clubs for the rest of the round, even if you lose one or break one while making a stroke. But you can continue using a damaged club or have it repaired if possible. If you start a round with fewer than 14 clubs, you can add clubs during the round until you reach 14, but you must not delay play in doing so. When you have a partner, you can share clubs, provided that the total number of clubs between the two of you is no more than 14. For example, if you have 6 clubs and your partner has 8 clubs, the total is 14 and you can share.
You cannot purposely adjust or alter clubs during your round, which includes making changes to adjustable clubs. But if an adjustable club becomes loose during the round, you can repair it by moving it back to the original setting.