[Quality Construction]: Coated steel provides house leveling jacks with strength, durability and a working load capacity up to 24,700lbs (11,204kg) dependent on timber used. [Fits Your Needs]: 14.5-18.5in (36.8-47 cm) adjustable screw jack lift fits 4x4in (10.16x10.16cm) lumber; 3.5x6in (8.9x15.2cm) base plate has four 0.6in (15mm) and two 0.3in (8mm) mounting holes.
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