Redesigned XB2 ball differential offers enhanced performance. Recommended for all XB2 designs whenever applied to very-low to medium traction dust or clay areas to enhance traction. The externally-adjustable ball differential is machined from HUDY Spring metal™ which can be also hardened for additional durability and long lifespan. A high-quality carbide thrustbearing and carbide balls are included for ultra-smooth procedure. Includes outdrive adapters made for use with drive shafts with 2.5mm pin.