Oreq Pro Animal 22" Plaster Brush 50% Grit & 50% Lime Bristle No Metal - No metal = no corrosion, no pole damage, no vinyl liner tearing, no rust causing screws to leave behind. Stronger - The patented SpeedLock collar strengthens the tool connection while still allowing it to flex and bend when needed. Corner Brushing - Exclusive bristled end caps designed for brushing in those difficult corners. Magnetic - Strong magnets allow you to quickly pick up those rust causing metal objects. Surfaces - Can be cement, plaster and gunite pool surfaces.