A prosthetic attachment for a prosthetic limb. A base is attached to the prosthetic limb. The base has a magnet that is surrounded by base valleys and base peaks. An attachment piece is attached to the prosthetic attachment. The attachment piece also has a magnet that is surrounded by attachment piece valleys and attachment piece peaks. The magnetic force between the base magnet and the attachment piece magnet attracts the prosthetic attachment to the prosthetic limb so that the base peaks and valleys mates with the attachment piece peaks and valleys for a secure removable attachment. In a preferred embodiment a locking device is used to further secure the prosthetic attachment to the prosthetic limb. In a preferred embodiment the prosthetic attachment is a prosthetic hand and the prosthetic limb is a prosthetic arm.