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Aluminum Spinners Dave Brown's Vortech aluminum spinners are spun from aluminum sheet, not molded/cast from brittle material or machined out of existing bar stock. Each spinner is precision CNC machined to exacting tolerances giving you the best combination of strength and light weight. The back plate is knurled for positive grip between the engine's drive washer and propeller, and locks the spinner cone into place to stop spinner cone expansion. |