LDXDRU 4Pcs Adjustable Support Jack for The Floor Mini Screw Jack Adjustable Floor Jack, Post 4.3"-6.5", Galvanized High-quality: Mini Screw Jack made of high-quality galvanized steel, robust and wear-resistant, galvanized surface treatment. Although it is small in size, but big in strength and durability Adjustable: This adjustable support jack is extremely versatile and useful in small spaces. This product includes a safety lock set screw to ensure security. Extendable from 4.3 to 6.5inch/110 to165mm, screw jacks can be adjusted perfect height for your needs Outdoor Use: The post support can withstand high loads and harsh weather conditions. The surface of house leveling jacks is galvanized to prevent rust. Long-lasting use even when installed outdoors Easy to Use: To make adjustments to the height of the mini screw jack, Just use a pipe wrench to turn the screw to the required height, and then tighten the positioning nut Wide Application: Perfect temporary or additional support for primary areas such as stairs, porches, decks, crawl spaces and heavy load areas, jack post also can be used permanently as a secondary support