TKR5149A - Tekno ? Differential Cross Pins (Aluminum, 6pcs, requires TKR5150 gears) TKR5149A - Tekno ? Differential Cross Pins (Aluminum, 6pcs, requires TKR5150 gears) DESCRIPTION This is a pack of six optional Tekno RC Aluminum Differential Cross Pins intended for use with the TKR5150. These pins fit in the same differential case as the EB48 and SCT410. They do require the new differential gears TKR5150 to be compatible in the EB48. These new Pins are bigger in diameter, making the ends of the Pins flat so there is more contact area in the differential case. This helps eliminate wear on the case and produces a smoother, longer lasting differential. (description exceeds maximum possible length)