( EXTRA CLEARANCE ) 5 inch long extension bar adds extra length and is great for working in hard-to-reach areas.( EXCEPTIONALLY STRONG ) The impact extension bar is made from heavy duty chrome molybdenum (CR-MO) steel for exceptional strength and flexibility.( LASTS FOR YEARS ) Black phosphate finish for maximum protection and durability.( INSTANT IDENTIFICATION ) The impact extension bar features roll stamped markings to ensure permanent and instant socket identification.( SAFE TO USE ) Designed for use with a locking pin and ring to increase safety when working with pneumatic tools.