Onefinity Redline spindles are the most advanced plug and play spindle kits on the market today. Featuring a sleek and stylish patent pending design, compact all metal enclosure, A high quality custom made spindle with four ceramic bearings standard. In addition, it’s the only safety approved plug and play spindle kit on the market today. No other spindle kit on the market has the quality, reliability and safety that the Onefinity Redline spindle has!