These Nemco Depth Rollers are for the ShrimpPro 2000(R) Power Shrimp Cutter & Deveiner(TM). This cutter can cut, devein, split or butterfly 4,000 to 6,000 shrimp in an hour. Easy to use, the blade can accommodate small, medium or large shrimp. With a small footprint, this design is ideal for commercial kitchens. This set includes three rollers - small, medium and large.