Braising steak is cut from a variety of muscles which needs slow, moist cooking to keep it melt-in-the-mouth tender. Braising steak is usually sold in whole pieces but you can get your butcher to dice it up for you or do it yourself at home.
Braising steak is ideal for braising and slow-cooking. Do not cook it like you would a normal steak, as it will not be as flavoursome and tender as it can be when properly cooked.
If you're looking for a smaller cut to braise or cook slowly, try some diced or cubed beef, or alternatively try chuck steak or shin of beef.