In the sport of golf, a putter is a specialize club designed to push or roll the ball along the ground towards the cup. They are generally used from very close distance to the cup, generally on the putting green, though certain courses have fringes and roughs which are suitable for putting. While no club in a player's bag is absolutely indispensable or required by strict rules, the putter comes closest even though it is so highly specialized; it is the best tool for the job and virtually no golfer is without one.