The Mercedes-Benz CDi injector clamping bolts can be prone to seize in place and can often break off when being removed. This kit provides the special tools required to drill out the broken bolt and fit M6 threaded inserts to allow new OEM M6 bolts to be used. Application: Mercedes-Benz CDi engines.Contents: M8 x 1.0mm Tap, 7 - 8mm step drill, 6mm drill, drill guide, insert fitting tool & 5 threaded inserts. As the task can be performed with minimal dismantling & the cam cover remiaing in place, this tool is a great time saver. Use with appropriate tap wrench - Laser recommends Part No. 6000.