EE WAS USING A CLECO HAND HELD GRINDER W/6"" GRINDING WHEEL TO SHARPEN A BIT. THE GRINDING WHEEL CAME APART AND A PIECE OF IT WENT BETWEEN THE TOP OF HIS SAFETY GLASSES AND THE LOWER RIM OF HIS HARD HAT STRIKING HIM JUST ABOVE LEFT EYE. HE HAD A LACERATION & WAS TAKEN BY PRIVATE VEHICLE TO MED-CENTER NORTH MACON. FURTHER EXAM REVEALED A FRACTURE OF SKULL. TRANSPORTED FOR SURGERY.