This is a bayonet shaped instrument with a very sharp trocar like tip. The tip is guarded at some distance to ensure that the tip does not prevent too deep into the tissue. In quinsy drainage the sharp tip is used to pierce the bulge of the swelling with the forceps in closed position. Then after successful piercing it is opened like a sinus forceps to facilitate drainage of pus.
Quinsy forceps seen in action
Image showing quinsy forceps