"X MARKS THE SPOT WITH A DOT !!" THIS IMPLANTOLOGICAL ROUND BUR WITH A Ø 1,8 MM HEAD AND AN OVERALL LENGTH OF L 34 mm IS USED FOR MARKING YOUR DRILL SITE. DIN-/ISO SHAFT. STAINLESS-STEEL. THIS ROTATING INSTRUMENT HAS BEEN CRYOGENICALLY TREATED TO GIVE IT, HENCE YOU, A SIGNIFICANTLY LONGER SERVICE LIFE !!