What are the muscles that flex the wrist and allow a human to make a fist?

because your extensor tendons cant extend that far. Yeah good answer except we can't understand that!!

The Biceps flex the elbow The Triceps extend the elbow

You see the tendons at the bottom of your wrist, what ever muscle is conected to thoes

triceps brachii

one muscle is the Flexor Carpi Radialis, it is a thin tendon at the wrist and inserts onto the base of the 2nd metacarpal.