The Monarch Aluminium Roller Frames are 40% lighter* compared to traditional steel roller frames. Equipped with a strong 10mm aluminium rod & frame and a heavy duty 3.7mm reinforced plastic ribbed cage. This combination greatly improves the overall frame weight & frame balance to provide superior control while also helping to reduce fatigue when used for long periods. The quality inner bearings assist with providing a super smooth roll action to reduce paint splatter and track marks, while the anti-slip mechanism securely holds rollers in place and prevents slippage when in use.