The Craftsman 934978 Bolt On Sander Attachment is a cordless power tool that operates on lithium-ion batteries, providing 20 volts and 4 amps of power for efficient sanding tasks. This model is designed in the United States and comes as a single unit without a battery included. The sander attachment is easy to install and remove, making it a versatile addition to your workshop or home improvement projects. With the Craftsman brand reputation for quality and durability, this sander attachment is a reliable choice for all your sanding needs.