This particular kind is the first every in the market and extends over 21 inch, thats from 8 to 21 in just an instant. It carries a strong spring mechanism, which when push on the lever on the handle, carries a powerful opening. This Automatic Baton has a black rubber base handle with the firing lever which also has a safety switch to protect from accidental opening. It comes with a holder ring at the top of the handle. The expandable part is made from full stainless steel and carries a studded end. It also comes equipped with a full black genuine leather case with a belt loop. To lock up just simply hit against the ground, HARD, to unlock the section and re-track it back to its original 8 size. This can definitely do some damage once held.