When would you use skip tooth (ST) blades?
ST stands for skip tooth. ST blades are best used for blending short areas in with longer lengths, for coarser coat breeds such as terriers, for very thick or double coats when finer tooth blades 'chew' the coat, or for the initial 'rough cut' if you want to take bulk off the coat before the bath.
The uneven teeth on a skip tooth blade allow more coat in to the cutting blade, making getting under mats easier, so are also a popular choice for matted dogs who need to be shaved short.
Important: If you are inexperienced, an F or FC blade gives extra protection from skin being pulled in with the hair, so ST blades are best used by experienced or trained groomers only.
An FC blade (left) compared to an ST blade (right), shown below: