TOWKING Square Trailer Jack 8000 lb, 15" Lift — 25-40" Travel, Swivel, Weld-On

The TOWKING 8000LBS Square Trailer Jack is a heavy-duty swivel jack that provides up to 15" of lift, a 12" adjustable drop leg, and a 25"–40" travel range for secure, durable trailer support.

Built for larger trailers and demanding towing tasks, this square trailer jack combines a high 8,000 lb capacity with a swivel design and corrosion-resistant powder coat to handle seasonal exposure. It’s available as a weld-on unit for a permanent, high-strength installation or as a bolt-on option when you supply your own mounting hardware. SAE-compliant manufacturing and heavy-gauge steel construction emphasize reliability without overpromising performance.

How much weight can this jack safely support?

The TOWKING square jack is rated for an 8,000 lb load capacity, making it suitable for many heavy-duty trailers when installed correctly. Capacity ratings assume proper mounting and use on stable ground; always follow safe loading and handling practices.

• Rated capacity: 8,000 pounds (3,629 kg)
• Intended for larger utility, equipment, and travel trailers
• Capacity applies to vertical support, not towing or dynamic loads

What are the range and lift dimensions, and why do they matter?

This jack offers a 25" retracted length and a 40" extended length for a total movement range of 15" plus an additional 12" adjustable drop leg. That range accommodates a wide variety of trailer tongue heights and makes hitching and leveling easier across different vehicles.

• Retracted length: 25" for compact storage under trailer tongue
• Extended length: 40" to raise trailers for hitch clearance
• 12" drop leg: fine-tunes ground contact height for stability

How should I mount this jack — weld-on or bolt-on?

The manufacturer recommends welding for the strongest, most permanent installation and best structural integrity. A bolt-on option is available if welding isn’t possible, but mounting hardware (bolts, nuts, washers) is not included and must be supplied by the installer.

• Weld-on: permanent, highest strength, recommended by TOWKING
• Bolt-on: viable alternative; hardware not supplied
• Ensure correct weld procedures or proper bolt grades for safety

How does it withstand weather and wear over time?

Manufactured from high-strength steel and finished with a durable powder coat, this jack resists rust and common outdoor corrosion. It’s built to meet SAE standards, which helps ensure consistent quality and longevity when used and maintained reasonably.

• Powder-coated finish for weather and rust resistance
• High-strength steel construction for durability
• SAE-compliant production for quality assurance

Who is this for: The TOWKING 8000LBS Square Trailer Jack suits trailer owners who tow heavier loads or need a robust, long-lasting support jack. It’s a good choice for farmers, construction contractors, RV owners, and anyone who prefers a weld-on permanent mount for maximum strength or a bolt-on option when welding isn’t available. Choose this jack if you need a high-capacity, weather-resistant swivel jack with wide lift range and SAE-level manufacturing standards.