Article: Wrist curls are one of the quintessential wrist and forearm exercises. To do a wrist curl, you'll need a weighted dumbbell (you can also use a barbell to hit both hands at once).  Sit at a bench or bicep curl rack. Hold your dumbbell so your palm faces upwards.  Using only your forearm muscles, curl the dumbbell up toward your wrist as far as you can without bending your elbow. Lower the dumbbell back down and repeat the curling motion. Repeat for both arms. Do three sets of 15 reps or until you feel sufficiently fatigued. Unless otherwise noted, these set recommendations hold true for all exercises in this article.  You can also do this exercise at home with a soup can or a jug of milk in place of a dumbbell.

What is a summary?
Try wrist curls as a good "bread and butter" exercise.