Linear reciprocating device

A portable system for imparting a reciprocating motion comprising:

• a driving member having an upper surface and a lower surface joined by one or more edges, a battery-powered drive mechanism, and first and second connector studs extending from the lower surface at spaced apart positions, one of the studs being connected to the drive mechanism which is configured to move said stud back and forth in a linear reciprocating manner;
• and
• a removable attachment comprising a body having on one surface a treatment surface or means for carrying a treatment surface and on an opposite surface first and second slots each extending inwards from a slot opening on opposite lateral edges of said body towards respective locating recesses, the spacing between the respective locating recesses corresponding approximately to the spacing between the connector studs of the driving member, wherein, in use, connection of the attachment to the driving member is effected by means of the studs being entered within a respective slot opening in the opposite lateral edges and then moved into the respective locating recesses by means of a twist-fit action.