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 kinking yet limber and non-slip for easy and effective handling.Oztec Flexible Shafts are interchangeable on all Oztec power units, are reversible (doubling their service life), and come supplied with "quick change" adapters.