The heavy-duty lid locks down during cooking; an inner sealing ring keeps the steam in. In addition to a pop-up pressure indicator and a simple steam release mechanism, there is an overpressure plug that will let off steam if it builds up excessively. This pressure cooker is useful for weeknight dinners or for any meal that needs to come together quickly. An accompanying booklet contains more than 65 recipes, ranging from basic soup stocks to stews and pot roasts--even desserts like 5-minute custards! Tenderize lean cuts of beef or pork; or cook chicken, fish, or vegetables faster than you can in a microwave, and without losing moisture.