Using Reel Engine Design 2.0™ – Quantum’s Smoke® S3 series is a spinning reel in an all aluminum unibody construction, which keeps all the gears and key components in precise alignment for a smoother more durable reel, versus more typical 2-part reels. Speaking of gears, Smoke® S3 reels feature an asymmetric gear that is forged and machined from high-strength aluminum to allow the gears to mesh better for incredible durability and smoothness.