With any wrist injury, first carefully clean any surface wounds in order to prevent infection. Select a cylindrical object roughly 3 to 4 inches long and 1 to 1 ½ inches in diameter (depending on hand size). This is placed in the hand, adding stability to comfort the victim. Select a straight, rigid, relatively flat object such as a ruler, paint mixer, layers of cardboard, sticks, etc to use as a splint.