Lightweight first gear drive flange includes factory-pressed (non-replaceable) top-notch German one-way bearing, hand-ground for optimum running precision and power. The one-way bearing must certanly be regularly serviced, washed, and oiled (we recommend making use of # 106231 HUDY One-way Lube). Made to be used with new little 2 rate. CNC-machined from tough Swiss 7075 T6 aluminum