3.5 "cracked handle allows easy control of cracking force, pressing the nut with a fine metal tip without damaging the core. 1.5-inch maximum cracking size for most sizes of nuts. Stainless steel rigid cracking system will not break when cracking black walnut and other hard nut shells. Triangular design, easy to hold in the hand, can hold the nut case, so that they do not fly around. This nutcrackers are a great addition to any kitchen and are a must for nut lovers (especially those with black walnuts). Made of all stainless steel. Maximum cracked nut size 1.5 ". This could be your first black nut cracker! Tip: You may need to crack once, then turn the hard nut and crack once or twice. The manual nutcracker is a heavy and super-strong design that can be used to crack all nuts, hickory, walnut, almond, and is very effective for hard nuts (such as black walnuts, hazelnuts, California nuts, macadamia nuts, etc.)!