Chef'n Hullster Tomato Huller Emulating the design of its big brother the Stem Gem, this tomato huller cores tomatoes with minimal effort thanks to the button activated butterfly stainless steel blades. The Hullster makes short work of prepping all tomatoes varieties from heirloom to cherry. To use, just push the green button to extend the serrated claw and insert into tomato around the core. Next, release the button and twist to remove the core. The core comes out quickly and cleanly, perfect for canning, making stuffed tomatoes, or cooking sauces. Top-rack dishwasher safe. Choose smart, easy-to-use kitchen utensils that are built on tasteful design, new technologies, and the trusted reputation of Chef'n.