General and pediatric surgeons commonly treat hypertrophic pyloric stenosis. A skillful pyloromyotomy without complications culminates in a gratifying experience. An instrument designed for this purpose should be safe, versatile and easy to use. A modified curved, 6 inch clamp facilitates doing a pyloromyotomy by implying the same action as other more commonly used instruments. The natural spreader for the pylorus is easy to make and it is also relatively inexpensive.