It varies from about 22 degrees in a 3-iron for a lower, longer trajectory to 64 degrees in a wedge for short, high shots. This is merely a cosmetic question. A satin finish can be very attractive, but in general has a duller appearance than polished or chrome-finish clubheads. Sole This is the very bottom part of the clubhead. If you look closely at the sole of your club, you'll notice it has a slight curvature from toe to heel and from leading edge to trailing edge.
Sole width is another factor.
A narrower sole works better from fairway and tight lie conditions while a wider sole is better for plush lies. Modern Improvements Low Center of Gravity Irons from most companies now claim to have a much lower center of gravity than their older counterparts. This lower center of gravity allows for the ball to get airborne on a higher trajectory more easily. In the last few years new steels and dense inserts have been used to provide easy-hitting advantages. These materials allow the designer to maintain the strength and integrity of the clubhead while placing more weight on the sole, and in different parts of the iron head where it's most efficient.