Transform your basement or cellar with these heavy-duty adjustable jack posts designed for superior structural support. Each set includes 4 metal screw jacks that adjust from 11 inches to 14.5 inches in height, perfect for lifting and stabilizing joist beams and ceiling supports. These versatile floor jacks boast an impressive center point load capacity of 10,000 lbs, making them ideal for serious structural applications. The universal fit design and tool-free installation make these posts accessible for various support needs. Built with durable metal construction, these jack posts provide reliable performance without requiring assembly. Each post is precisely engineered to deliver consistent support across its full adjustment range. The compact package dimensions of 6.75 x 6.75 x 4.25 inches make storage and transport manageable. Whether you're reinforcing a sagging floor, supporting ceiling beams, or stabilizing structural elements, these adjustable jack posts offer professional-grade performance for your building support needs.