General description This set of four diesel injector cutters ensures that the injector seat is bored and faced to the exact dimension when replacing or reconditioning the diesel injectors, avoiding blow back and poor emissions. Technical specifications Set of 4 cutters 17mm flat cutter with 19mm external diameter for Mercedes-Benz CRD 17mm flat cutter with 17mm external diameter for BMW, PSA, and Renault 17mm angled cutter with 21mm external diameter for Fiat and Iveco 15mm flat cutter with 19mm external diameter for other makes Supplied with a 3/8" drive T-bar Usage Used for re-cutting injector seats when reconditioning the diesel injectors.