US Pro 7PC Diesel Injector Seat Cutter.
 
Set contents:
15mm x 19mm Flat Reamer for Universal injectors.
17mm x 17mm Flat Reamer for Delphi/Bosch injectors (BMW/PSA/Renault/Ford).
17mm x 19mm Flat Reamer for Bosch injectors (Mercedes CRD).
17mm x 21mm Angled Reamer for Fiat/Iveco.
17mm x 17mm Angled Reamer for Mercedes Benz CDI.

T handle 135 x 160mm 23 socket.
Pilot Hex 19mm x 173.8mm.