Feature●MINI SCREW JACK:Although the Mini Screw Jack is small in size, it is big in strength and durability.●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.●SAFE & SECURE: Built with high quality materials, this adjustable support jack is extremely versatile and useful in small spaces.This product includes a safety lock set screw to ensure security.●VARIETY OF USES:Temporarily secure a weak floor or screw jacks home leveling post floor jack.●STURDY & DURABLE:Support Jack made of heavy duty steel, more durable and sturdy.Description Adjustable Support Jack for the floor,Post Floor Joist Jacks,Mini Screw Jack-- Post 11.5" to 14.5"