ST1: Fine is used for smoothing surfaces easily when a fine finish is needed.ST1: Fine is a finishing tool not a digging tool rough treatment will shorten the life of the tool. Using either end of the tool always use a criss cross pattern over the desired area of the sculpture, this helps to ensure a more even surface. ST2: Medium is used for smoothing surfaces easily when a medium finish is needed ST2: Medium is a finishing tool not a digging tool rough treatment will shorten the life of the tool. Using either end of the tool always use a criss cross pattern over the desired area of the sculpture, this helps to ensure a more even surface. ST3: Heavy is used for smoothing surfaces easily when a heavy finish is needed ST3: Heavy is a finishing tool not a digging tool rough treatment will shorten the life of the tool. Using either end of the tool always use a criss cross pattern over the desired area of the sculpture, this helps to ensure a more even surface.