Blue Devil King Fin Power Brush with Nylon Bristles | B3516KFBU

The Blue Devil King Fin B3516KFBU is a dual-action power brush engineered to deliver up to 10 times the scrubbing force of a standard pool wall brush — cutting cleaning time and effort in half. The secret is the King Fin's patented fin design, which creates a hydrodynamic suction effect that keeps the brush head pressed firmly against pool walls and floors during both the forward and backward stroke, delivering equal scrubbing force in both directions without the user having to apply extra downward pressure. This one-of-a-kind dual-action design makes wall brushing possible with a single hand, significantly reducing fatigue during longer cleaning sessions. White nylon bristles provide effective scrubbing power that is firm enough to dislodge algae and buildup yet gentle enough for below-ground vinyl and fiberglass pool surfaces. Pre-assembled and compatible with standard pool poles, the King Fin is a game-changing upgrade from traditional flat pool brushes.

Highlights

• 10X the Scrubbing Force of a Standard Brush: The King Fin's patented fin mechanism generates a hydrodynamic suction effect that holds the brush head firmly against pool surfaces during use — delivering up to 10 times the cleaning force of a conventional wall brush with significantly less physical effort.
• Dual-Action Forward & Backward Stroke: Unlike standard brushes that only clean effectively on the push stroke, the King Fin delivers equal scrubbing force on both the forward and backward stroke — effectively doubling the cleaning productivity of every pass across pool walls and floors.
• One-Handed Operation for Reduced Fatigue: The fin's wall-hugging suction eliminates the constant downward pressure required with traditional brushes, making it easy to control and maneuver with a single hand — a major advantage for pool service professionals and homeowners tackling larger pools.
• White Nylon Bristles — Safe for Vinyl & Fiberglass: Durable white nylon bristles provide strong, effective scrubbing against algae, scale, and waterline buildup while remaining gentle enough for below-ground vinyl liner and fiberglass pool surfaces where stiffer steel bristles would cause damage.
• Pre-Assembled & Standard Pole Compatible: Arrives pre-assembled and ready to use right out of the packaging, and connects directly to any standard 1-1/4-inch pool pole — no tools or additional adapters required for immediate installation and use.