Features 1、Durable Construction: Made of mirror‑polished marine grade 304 stainless steel for maximum rust resistance and durability. 2、Telescoping Adjuster: Adjuster glides easily to any length between 299mm to 534mm and can be easily secured a position with locking on each position by rotation the black conical point knob. 3、Strong Practicability: This window adjusters allow windows to remain open to ventilate areas as needed. Used for yacht and marine hardware. 4、Wide Application: Ideal for the lighter door, cabinet doors, window, lighter hatches, table leaves, fore hatch and a wide variety of uses. 5、Easy Installation: Easy to install, no complicated tools required, convenient to use, save time and effort, and can be used for a long time. Specification Item Type: Hatch Adjuster Material: 304 Stainless steel Length: Approx. 299-534mm/11.77-21.02in Application: RV, yacht, ship Package List 1 x Hatch Adjuster