High quality: high hardness reinforced aluminum alloy, super strong, not easy to deformation. Non-slip handle with non-slip design, good grip and not hurt your hands. Easy cracking nuts, pecans, hazelnuts, almonds, walnuts, Brazil nuts, may not work for hard black walnut. Very easy and quick to use, perfect for cracking more nuts. Also works great as a bottle opener. Cup shape design to help hold walnut tight no matter for small or larger nuts, and to avoid popping nuts into pieces.