The difference to the non-hardened version is the expandable tubes, which are made from a more superior material, which is hardened by heat treatment. Three types of handles are available – anti-slip handle with indented – rough surface of the type "H" or gentler surface of the type "HT" (this design expressively decreases any possibility of the baton being yanked from the hand and gives the user a comfortable certitude) or ergonomic handle of the type "HE" with pleasant smooth surface. The batons are highly resistant to a flexion if the baton is exposed to a hard stroke. They meet the requirements of the German standard for expandable batons and are intended for professional use by police and other authorities. Surface finish is black nickel-zinc (with good resistance to abrasion), or white chrome.