This pack contains 5pcs of #83 (.0120) with a 5.50 flute length. These New Micro Drill Bits are made of Tungsten Carbide. The over all length is 1.50". The shanks have a diameter of .1250 and all have identification rings on them. 05WS83-550FL$15.60 Call: 847-419-1267              Fax: 847-419-1241              Email: Drills2001@aol.com