The Tekno RC Hardened Steel Differential Case offers improved drivetrain durability for those that run 6S batteries. CNC machined from steel and hardened, this diff case handles the extreme conditions found when pushing your vehicle to the limit. Although a steel diff case is perfectly suited for the MT410 or ET48 with a huge motor or 6s battery, it can also be used as a tuning option to help reduce wheel spin when racing your ET48, EB48, NT48, NB48 or SCT410. Not only is it more durable than the original composite diff case it also has increased fluid capacity for that long bash or race session. The TKR5113S hardened steel diff case is a direct replacement for TKR5113 composite diff case, and can be used in the front, center or rear differentials of the vehicles listed below and no additional parts are required.