What tool is primarily used to shape a bead of acrylic on the nail?

The sable brush is primarily used to shape a bead of acrylic on the nail due to its unique characteristics. This type of brush is made from the fine hairs of the sable weasel, which are soft yet resilient, allowing for excellent control and precision when applying and shaping acrylic products. The fine tip of the sable brush enables the nail technician to manipulate the acrylic bead smoothly, creating the desired shape, whether it involves creating a gentle arch or detailing at the cuticle area.

A well-shaped bead is crucial in acrylic nail application, as it determines the final look and strength of the nail. A sable brush retains moisture well and allows the technician to blend and smooth out the acrylic effectively, which is vital for achieving a flawless finish. This makes it the preferred tool among professionals for this specific task in the nail enhancement process.