The PRO PROP is an adjustable panel prop for door, hoods, trunklids and hatches. The PRO PROP is made from strong carbon fiber tubes with stainless steel hook and anchor latch. The MAXX PROP extends from a closed postion of 17 inches to a fully extended lenght of 21 inches. The PRO PROP has 4 slide button adjustment holes at 1.5 inch intervals for lenght adjustment. The PRO PROP also has a twist lock collar adjustment systems. You choose. You want to use the twist lock feature for a faster, infinite lenght adjudtment? Simply push the slide button down, rotate extending tube 180 degrees, and wah-lah, you now have a twist lock prop. The latch hook is angled to accommodate any postion. The striker hook uses a slide button nut assemble to quickly and securly attach to any panels striker. The PRO PROP is difinitely the PDR's industries most advanced and versitile prop yet! Check out the MAXX PROP if you want a longer version.