Surgical Instruments with flexible shafts Description & Article RM Classic Countersink reamer flex Gen.1- 3.14.251 Reaming shaft flex. Gen.1- 3.15.252 Countersink reamer flex. Gen.2- 3.14.256 Reaming shaft flex. 46-52 Gen.2- 3.14.257 Reaming shaft flex. 54-64 Gen.2- 3.14.258 Reaming shaft flex. 60-68 Gen.2- 3.14.259 Shaft flex. Gen.1- 3.40.501 Countersink reamer flex. Gen.3- 55.02.1901 Reaming shaft flex. Gen.3- 55.02.1903 seleXys Shaft flex- 5502.00.2 Shaft flex- 3.14.545