IM PRIME MAUERMAYER STONE PUNCH FORCEPS IS REUSABLE AND AUTOCLAVABLE AND IT IS USED TO REMOVE BLADDER STONES. IT HAS A SET OF STONE PUNCH , SHEATH WITH OBTURATOR FOR STONE PUNCH AND VISUAL OBTURATOR, IT HAS A SHARP EDGE AT THE TIP OF MAUERMAYER PUNCH WHICH WILL BREAK STONES. IT COMES WITH AN ERGGONOMIC DESIGN WHICH MAKES MORE HELPFUL TO SURGEON, IT EASY FOR THE SURGEON TO HOLD THE INSTRUMENT PROPERLY IN HIS HAND.