The Inupiat style ulu blade has a center piece cut out and both ends of the blade fit into the handle.
The shape of the ulu ensures that the force is centered more over the middle of the blade than with an ordinary knife. This makes the ulu easier to use when cutting hard objects such as bone. Because the rocking motion used when cutting on a plate or board with an ulu pins down the food being cut, it is also easier to use an ulu one-handed (a typical steak knife, in contrast, requires a fork).
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