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