Lightweight first gear drive flange includes factory-pressed (non-replaceable) high-quality German one-way bearing, hand-ground for optimum operating accuracy and power. The one-way bearing should be frequently serviced, washed, and oiled (we recommend using # 106231 HUDY One-way Lube). Designed to be utilized with new little 2 speed. CNC-machined from tough Swiss 7075 T6 aluminum