For all common household screw cap sizes - opens effortlessly, extremely easy to use, simply turn the crank - it then locks itself. Operated with one hand while the other holds the jar. Behind "Profi Plus" are over 100 different kitchen tools that meet the highest demands of professional chefs. The heavy-duty design made of high-quality Cromargan, stainless steel 18/10 is absolutely stable and durable, waterproof, and guaranteed dishwasher-safe - simply indestructible. The sophisticated yet timeless design fits into any modern kitchen.