Oztec Flexible Shaft Oztec FS 07 OZ 7ft Concrete Vibrator ShaftWhen transmitting power from the power source to the vibrating head, select one of Oztec's flexible shafts. Oztec Flexible Shaft inner cores are made from extra high carbon steel wires with casings made from tough abrasion resistant neoprene rubber, reinforced with multiple layers of high tensile wire braiding with a hardened flat steel liner. This construction makes Oztec Flexible Shafts rigid enough for driving into the stiffest concrete without