THIS BIT HAS A "LESTER" CUTTING THREAD THAN A STANDARD 3/16 BIT! THIS MEANS THAT IT SHOULD BE REMOVED FROM THE FOUNTAIN TWICE. I HAVE TRIPLE THREADED DRILLS FOR LONG ACCESSIBILITY. WHAT IS THE REAL SUMMARY. REMOVE PERMANENTLY TO CLEAN THE THREADS. GOD PLEASE A 12" CHISEL WITH A 2" CUTTER!