By first cutting the heart out of the cheese, you can then cut perfect pieces with the Straight Knife. First of all, this makes it easier for the customer to cut cheese slices at home. But secondly, the piece of cheese also appears to be bigger than it really is. This makes customers feel like they're getting more cheese for a lower price.
If you purchase the Divide-O-Matic cheese cutter or the Freshpack cutting unit, you have to order the knives separately. Order this fantastic Straight Knife and the Divide-O-Matic Heart Knife. Get the complete set, and you'll be good to go for many years to come!