SAFE - The floor jacks are fully adjustable and come with a safety lock set screw to ensure security for added strength and safety. SUPPORT - Perfect temporary or additional support for primary areas such as stairs, porches, decks, crawl spaces and heavy load areas. Durable-Built with high quality materials,Coated to prevent corrosion.Although the Mini Screw Jack is small in size, it is big in strength and durability. DESIGNED-All-in-one jack stand is easy to install All moving parts fit snugly to avoid lateral displacement. 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.