Wrist-spin bowlers are slow bowlers who use their wrist to generate revolutions on the ball, so that when it pitches it 'spins' off the wicket.
Right arm wrist spinners are known as leg-spinners and try to get the ball to move from the leg-side to off-side against a right handed batter. Left arm wrist spinners attempt to spin the ball the other way (from off-side to leg-side against a right handed batter) and are said to bowl 'Chinamen'.
Good wrist-spin bowlers generate a lot of spin. They also attempt to flight the ball in the air and vary their pace to get the batter to play a false shot.
Wrist spinners should always aim to pitch the ball up, fairly close to the batter to get them to try to drive.
Watch the video below for Leg-spin basic (to watch this video on You Tube website - click here)
Note that another excellent video on Leg-spin bowling is available on the BBC website - click here