Factory-pretensioned blade set NEVER, EVER, need tightening! Thanks to a Pretensioned blade cartridge, even your most inexperienced employees can easily change the blades. No wrenches required. Plus, they'll save time and slice with impeccable consistency. Features stainless steel blades and commercial-grade aluminum construction for lasting durability. Process up to a 4" diameter onion. Ideal for onions, celery, potatoes, pickles, firm tomatoes, oranges, lemons and limes. Top-down drive and ergonomic handle take the work out of slicing. Blades are razor-sharp stainless steel. Sturdy legs stabilize unit for smooth slicing. Rubber feet prevent slipping.