materials
Wood: Traditional and durable, though less common now.
Rubber: Offers shock absorption and a non-slip grip.
Plastic (e.g., polycarbonate): Lightweight and resistant to moisture and environmental factors.
Metal (e.g., steel, aluminum alloy): Strong, durable, and often used in expandable designs for their rigidity and impact.
Composite materials: High-strength, low-weight options like polyester graphite composites are also used.