Football shaped at the cutting end and smooth shafted, after insertion they are used in a coronal brushing motion against the canal wall possessing the greatest width of dentin. The diameter of the cutting bud on the GGD #1 is 0.5 mm, #2 is 0.7 mm, #3 is 0.9 mm, #4 is 1.10 mm, #5 is 1.3 mm and #6 is 1.5 mm. Not all GGDs are made from the same stainless steel, for example, Mani GGDs are made from a corrosion resistant hard fiber austenite stainless steel.Relatively inexpensive, GGDs are a far more economical option than their rotary nickel titanium (RNT) counterparts. Additionally, when a GGD fractures, it generally breaks at the latch end rather than the bud end. In the rare instances when a fracture at the bud does occur, the clinician must generally utilize a surgical operating microscope and ultrasonics to facilitate removal.