Foerster forceps

•  6" long (15.25 cm)
• Head with a diameter of 3/8" (9 mm) and a hole of 0.2" x 0.3" (5x8 mm).

Large model:

• 7" long (17.8 cm)
• Head of 9/16" (14 mm) and a hole of 0.28" x 0.59" (7x15 mm).

Both models have a 3-step locking mechanism.
Note that this tool is only to be used by professional piercers.