Traxxas Wheel Adapters, 12Mm Hex, Alum (Bl Andized)-4/Screw Pins-4/Drill

These are the 12mm Hex Adapters from Traxxas.

FEATURES:
Enables XO-1 Supercar type steel-splined driveshafts with 6mm axles to
    be utilized on the 1/10 scale Traxxas Slash 4x4, Rally 4x4, and
    Stampede 4x4
Sturdy machined aluminum building and construction, blue in color
Compatible with Traxxas brief course and rally wheels, and a lot of 12mm
    hex style wheels

INCLUDES:
4 12mm Hex Adapters, 6mm Drill Bit, Screw Pins, and Guidelines

REQUIRES:
Two #6451 XO-1 Front Driveshafts, TRAC6451
Two #6452 XO-1 rear Driveshafts, TRAC6452
One #6439 XO-1 Left and Right Guiding Blocks, TRAC6439
One #6455 XO-1 Left and Right Axle Carriers, TRAC6455
3 #5117 6x12mm Ball Bearing Sets, TRAC5117