Which type of nail features a small head that can be easily concealed when hammered into finished wood?

The finishing nail is designed specifically for applications in which the nail head needs to be minimized or concealed after installation. It has a smaller, more streamlined head compared to other types of nails, allowing it to be driven below the surface of the wood and subsequently filled or painted over, resulting in a neater finish. This is particularly important in woodworking projects, cabinetry, and when working with trim or molding, where appearance is critical.

In contrast, the common nail has a larger head and is generally used for structural purposes, making it less suitable for finished surfaces. Framing nails are designed for securing lumber in construction and also feature larger heads to ensure a secure hold, making them more visible. Sinker nails, while similar in purpose to common nails, are typically slightly smaller and may have a smoother finish to reduce the risk of splitting the wood but still lack the concealability offered by finishing nails. Thus, the finishing nail stands out as the most appropriate choice for situations requiring a hidden fastener.