Both the Single Shaft and the Double Shaft Tape Tools may be EITHER Clamped or Bolted into place. Two 4 inch (10cm) C-clamps are included with each tape tool
In figuring out which of the 4 sizes to chose from, the size of your plotter is not a factor. Reason being, you can put more than one roll of tape on the shaft at the same time.
You should take into consideration the width of your table or work bench where you are planning to use it.
For example, the 24 inch tape tool will hold up to 24 inches of tape. You can put on one roll of 24 inch tape or you can put on any configuration of rolls of tape up to 24 inches wide. You can also put on one roll of tape any size up to 24 inches wide. You can, but you don't have to fill up the shaft with tape.
For further information see: General Information