The advantage of the nutcracker shown in the illustration is that it can be adjusted to various-sized nuts. The handles are similar to those usually found on nutcrackers except that they are slotted at the cracking end to receive a special bar. This bar is 2 in. long, 1/2 in. wide, and 1/8 in. thick, with 1/8-in. holes drilled in it at intervals to allow for adjustment. Cotters are used in the holes as pins.

An Adjustable Nutcracker 191