Nail jars are small containers that hold powders or liquids used in acrylic nails. The lids of these jars keep out contaminants and emit a pleasant aroma from the monomers inside. Additionally, these jars look great on the manicure table. The jars are hand-crafted, so they may have irregularities or imperfections.

Jars are available in two different designs, the mechanical jar and the hydraulic jar. The mechanical jar uses a drillstring that stores energy before it fires. The hydraulic jar is powered by the drillstring. It stores energy in the drillstring and releases it when it strikes the nail. The jars may strike the nail up or down, depending on the application.