Forester slotted forceps, 6.5″ long, high grade 410 ASTM surgical steel with 13mm round head.   Most Commonly Used for a Tongue Piercing  Slotted opening clears needles up to 8 gauge

Head round measurements:

7mm –  Inner diameter at the top

12.5mm –  Length of inner round head

4.4mm –  Opening at the slot