Compatible For Mercedes-Benz OM601, OM602, OM603, OM605, OM606, OM615, OM616, OM617 Diesel Engines, 1/2" Drive socket. Example: Works for E300TD injection pump. You can pay ten times more but this will do the same thing. To installed new springs and washers in the delivery valves and this was a perfect fit. The only thing to remember is you may want a 3/8 to 1/2 adapter. This is a 1/2 drive socket but for the relatively low torque to secure the delivery valves you?ll likely be using a 3/8 drive torque wrench. Manufactured from chrome vanadium steel for strength and durability. Dedicated 33 point socket for diesel fuel injection use. Total length for the socket 56mm. BENZ33T Easy to use Efficient and convenient. Well designed for specific vehicles. Matching size and the spline inside make sure the plug be held. Features details This is a 1/2 drive socket but for the relatively low torque to secure the delivery valves you?ll likely be using a 3/8 drive torque wrench. APPLICATION --For installing and removing the pressure value holder of the MRSF-ERE injection pump compatible with Mercedes-Benz diesel engines, 601, 602, 603, 605, 606, 615, 616, 617. Also fits many early 250 300 models with in-line fuel pump.