Choosing wedges is much like selecting the right putter. Do not disregard how you feel about club appearance. If a wedge looks good to you, that's a factor in its favor. A specialty wedge should be suited to your course, or the courses you play most frequently. The same principle applies to the kind of sand in the bunkers.
Bounce varies from wedge to wedge.
The bounce, measured in degrees, is defined as the angle between the leading edge of the club and the amount the flange extends beyond it.