Which of the following nail shapes is best suited for customers who work with their hands?

The square nail shape is best suited for customers who work with their hands due to its strength and durability. This shape features straight edges and a flat tip, which helps to prevent breakage, making it ideal for those who engage in activities that require manual dexterity or involve physical labor. Square nails provide a solid surface that can withstand impact better than other shapes, allowing for less maintenance and fewer frequent repairs or breaks.

In contrast, while round nails can also be somewhat durable, they do not have the same level of edge strength as square nails. Almond and stiletto shapes, while aesthetically pleasing and trendy, are more prone to breakage due to their slender and pointed designs, which can be less suitable for someone whose hands are frequently in use for work, as these shapes don’t provide the same level of protection and can easily be damaged.