Abstract: A manually operated clip attachment apparatus or clipper has a generally planar main body plate which includes a longitudinal punch guide and clip channel. The lower end of the channel supports a die. A window is provided in the side of the channel for receipt of a clip. An open throat above the lower end of the channel and die is provided for placement of the deformable or flexible casing or bag material and thus defines a throat opening. A punch moves longitudinal in the clip channel to engage a single clip and move it along the channel about the gathered material and into contact with the die. A manual lever arm is pivotally attached to the main plate at one end. The opposite end includes a handle for operation of the lever arm. Intermediate the pivot end and the handle is a bearing surface which engages a follower cam attached to the punch. The lever arm is biased to a punch disengage position.