Professional tool for commercial or occasional use. Manufactured from chrome vanadium steel for strength and durability. Heat treated / highly mirror polished finish with knurled rings (for comfort and grip) SET Includes; 1/4 extension bar (total length 32mm) 1/4 extension bar (total length 50mm) 1/4 extension bar (total length 100mm) 1/4 extension bar (total length 150mm) 1/4 extension bar (total length 200mm) 1/4 extension bar (total length 275mm) Comes in a plastic storage tray for easy storage and transportation